./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:26:29,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:26:29,565 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:26:29,571 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:26:29,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:26:29,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:26:29,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:26:29,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:26:29,596 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:26:29,600 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:26:29,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:26:29,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:26:29,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:26:29,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:26:29,602 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:26:29,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:26:29,603 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:26:29,603 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:26:29,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:26:29,603 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:26:29,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:26:29,604 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:26:29,604 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:26:29,604 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:26:29,604 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:26:29,605 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:26:29,605 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:26:29,605 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:26:29,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:26:29,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:26:29,607 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:26:29,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:26:29,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:26:29,607 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:26:29,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:26:29,607 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:26:29,608 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:26:29,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:26:29,608 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:26:29,608 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:26:29,608 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:26:29,609 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:26:29,609 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:26:29,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-06-27 16:26:29,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:26:29,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:26:29,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:26:29,859 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:26:29,860 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:26:29,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-06-27 16:26:30,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:26:31,100 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:26:31,101 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-06-27 16:26:31,107 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8729f8f93/22733bdd94204265a8236e66e154ab5b/FLAG5a7e5345d [2024-06-27 16:26:31,119 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8729f8f93/22733bdd94204265a8236e66e154ab5b [2024-06-27 16:26:31,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:26:31,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:26:31,124 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:26:31,124 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:26:31,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:26:31,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5478d37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31, skipping insertion in model container [2024-06-27 16:26:31,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,150 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:26:31,315 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/array-eq-symm.wvr.c[2277,2290] [2024-06-27 16:26:31,322 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:26:31,328 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:26:31,341 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/array-eq-symm.wvr.c[2277,2290] [2024-06-27 16:26:31,343 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:26:31,358 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:26:31,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31 WrapperNode [2024-06-27 16:26:31,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:26:31,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:26:31,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:26:31,360 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:26:31,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,395 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 105 [2024-06-27 16:26:31,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:26:31,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:26:31,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:26:31,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:26:31,405 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,418 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 16:26:31,419 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,419 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,439 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,441 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:26:31,441 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:26:31,441 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:26:31,442 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:26:31,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:26:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:31,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:26:31,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:26:31,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:26:31,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:26:31,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:26:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:26:31,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:26:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:26:31,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:26:31,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:26:31,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:26:31,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:26:31,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:26:31,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:26:31,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:26:31,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:26:31,526 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:26:31,602 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:26:31,604 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:26:31,848 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:26:31,848 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:26:32,010 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:26:32,010 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:26:32,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:26:32 BoogieIcfgContainer [2024-06-27 16:26:32,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:26:32,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:26:32,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:26:32,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:26:32,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:26:31" (1/3) ... [2024-06-27 16:26:32,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2de794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:26:32, skipping insertion in model container [2024-06-27 16:26:32,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (2/3) ... [2024-06-27 16:26:32,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2de794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:26:32, skipping insertion in model container [2024-06-27 16:26:32,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:26:32" (3/3) ... [2024-06-27 16:26:32,021 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-06-27 16:26:32,027 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:26:32,035 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:26:32,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:26:32,036 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:26:32,081 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 16:26:32,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-06-27 16:26:32,170 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-06-27 16:26:32,171 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:26:32,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-06-27 16:26:32,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-06-27 16:26:32,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-06-27 16:26:32,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:26:32,234 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;@30c3b0cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:26:32,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:26:32,241 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:26:32,241 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-06-27 16:26:32,241 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:26:32,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:32,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:32,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:32,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1113111192, now seen corresponding path program 1 times [2024-06-27 16:26:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:32,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555698654] [2024-06-27 16:26:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555698654] [2024-06-27 16:26:32,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555698654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:32,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:32,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:26:32,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848686273] [2024-06-27 16:26:32,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:32,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:26:32,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:26:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:26:32,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:32,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:32,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:32,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:32,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:32,702 INFO L124 PetriNetUnfolderBase]: 207/323 cut-off events. [2024-06-27 16:26:32,702 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-27 16:26:32,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 323 events. 207/323 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1134 event pairs, 42 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 596. Up to 208 conditions per place. [2024-06-27 16:26:32,709 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 33 selfloop transitions, 3 changer transitions 1/40 dead transitions. [2024-06-27 16:26:32,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 175 flow [2024-06-27 16:26:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:26:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:26:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-27 16:26:32,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 16:26:32,723 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-06-27 16:26:32,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 175 flow [2024-06-27 16:26:32,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:26:32,729 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 73 flow [2024-06-27 16:26:32,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2024-06-27 16:26:32,734 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-06-27 16:26:32,735 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 73 flow [2024-06-27 16:26:32,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:32,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:32,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:32,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:26:32,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:32,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1220597756, now seen corresponding path program 1 times [2024-06-27 16:26:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:32,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857194095] [2024-06-27 16:26:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:32,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:32,902 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 16:26:32,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857194095] [2024-06-27 16:26:32,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857194095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:32,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:26:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065452358] [2024-06-27 16:26:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:26:32,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:26:32,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:26:32,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:32,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:32,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:32,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:32,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:33,069 INFO L124 PetriNetUnfolderBase]: 292/481 cut-off events. [2024-06-27 16:26:33,069 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-06-27 16:26:33,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 481 events. 292/481 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1950 event pairs, 170 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 392. Up to 319 conditions per place. [2024-06-27 16:26:33,075 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-06-27 16:26:33,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 48 transitions, 216 flow [2024-06-27 16:26:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-06-27 16:26:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 16:26:33,079 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 73 flow. Second operand 5 states and 68 transitions. [2024-06-27 16:26:33,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 48 transitions, 216 flow [2024-06-27 16:26:33,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:33,084 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 106 flow [2024-06-27 16:26:33,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-06-27 16:26:33,085 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-06-27 16:26:33,085 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 106 flow [2024-06-27 16:26:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:33,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:33,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:26:33,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:33,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1689689306, now seen corresponding path program 1 times [2024-06-27 16:26:33,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:33,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493206259] [2024-06-27 16:26:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:33,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:33,224 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 16:26:33,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:33,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493206259] [2024-06-27 16:26:33,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493206259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:33,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:33,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:26:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526780660] [2024-06-27 16:26:33,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:33,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:26:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:26:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:26:33,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:33,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:33,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:33,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:33,335 INFO L124 PetriNetUnfolderBase]: 231/382 cut-off events. [2024-06-27 16:26:33,335 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-27 16:26:33,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 382 events. 231/382 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1410 event pairs, 130 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 725. Up to 319 conditions per place. [2024-06-27 16:26:33,338 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 23 selfloop transitions, 2 changer transitions 15/43 dead transitions. [2024-06-27 16:26:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2024-06-27 16:26:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-06-27 16:26:33,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 16:26:33,341 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 106 flow. Second operand 5 states and 64 transitions. [2024-06-27 16:26:33,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2024-06-27 16:26:33,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 212 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:33,344 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 90 flow [2024-06-27 16:26:33,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-27 16:26:33,346 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2024-06-27 16:26:33,346 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 90 flow [2024-06-27 16:26:33,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:33,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:26:33,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:33,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash 140296278, now seen corresponding path program 1 times [2024-06-27 16:26:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:33,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515519189] [2024-06-27 16:26:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:33,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515519189] [2024-06-27 16:26:33,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515519189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:33,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:33,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:26:33,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817571954] [2024-06-27 16:26:33,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:33,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:26:33,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:26:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:26:33,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:33,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:33,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:33,559 INFO L124 PetriNetUnfolderBase]: 337/556 cut-off events. [2024-06-27 16:26:33,559 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-06-27 16:26:33,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 556 events. 337/556 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2315 event pairs, 155 based on Foata normal form. 18/569 useless extension candidates. Maximal degree in co-relation 1271. Up to 220 conditions per place. [2024-06-27 16:26:33,562 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 52 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-06-27 16:26:33,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 301 flow [2024-06-27 16:26:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-27 16:26:33,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 16:26:33,565 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 90 flow. Second operand 5 states and 80 transitions. [2024-06-27 16:26:33,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 301 flow [2024-06-27 16:26:33,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 61 transitions, 279 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:33,569 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 115 flow [2024-06-27 16:26:33,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-06-27 16:26:33,570 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-06-27 16:26:33,571 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 115 flow [2024-06-27 16:26:33,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:33,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:33,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:26:33,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:33,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash 880851478, now seen corresponding path program 1 times [2024-06-27 16:26:33,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:33,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716195967] [2024-06-27 16:26:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:33,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:33,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716195967] [2024-06-27 16:26:33,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716195967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:33,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:33,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:26:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981763899] [2024-06-27 16:26:33,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:26:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:26:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:26:33,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:33,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:33,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:33,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:33,755 INFO L124 PetriNetUnfolderBase]: 321/532 cut-off events. [2024-06-27 16:26:33,755 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-06-27 16:26:33,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 532 events. 321/532 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2081 event pairs, 115 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 1230. Up to 238 conditions per place. [2024-06-27 16:26:33,758 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 36 selfloop transitions, 5 changer transitions 11/55 dead transitions. [2024-06-27 16:26:33,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 55 transitions, 283 flow [2024-06-27 16:26:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-27 16:26:33,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-27 16:26:33,759 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 115 flow. Second operand 5 states and 74 transitions. [2024-06-27 16:26:33,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 55 transitions, 283 flow [2024-06-27 16:26:33,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:33,761 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 127 flow [2024-06-27 16:26:33,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-06-27 16:26:33,762 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2024-06-27 16:26:33,762 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 127 flow [2024-06-27 16:26:33,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:33,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:33,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:26:33,763 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:33,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:33,763 INFO L85 PathProgramCache]: Analyzing trace with hash 221294698, now seen corresponding path program 1 times [2024-06-27 16:26:33,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:33,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464142629] [2024-06-27 16:26:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464142629] [2024-06-27 16:26:33,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464142629] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:33,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388451297] [2024-06-27 16:26:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:33,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:33,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:33,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:33,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:26:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:34,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:26:34,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:34,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388451297] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:34,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:26:34,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-06-27 16:26:34,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968983765] [2024-06-27 16:26:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:34,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:26:34,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:26:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:26:34,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:34,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:34,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:34,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:34,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:34,370 INFO L124 PetriNetUnfolderBase]: 323/544 cut-off events. [2024-06-27 16:26:34,370 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2024-06-27 16:26:34,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 544 events. 323/544 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2116 event pairs, 93 based on Foata normal form. 16/557 useless extension candidates. Maximal degree in co-relation 1347. Up to 217 conditions per place. [2024-06-27 16:26:34,373 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 43 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-27 16:26:34,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 301 flow [2024-06-27 16:26:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 16:26:34,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-06-27 16:26:34,377 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 127 flow. Second operand 7 states and 83 transitions. [2024-06-27 16:26:34,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 301 flow [2024-06-27 16:26:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 286 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 16:26:34,379 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 148 flow [2024-06-27 16:26:34,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=148, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-06-27 16:26:34,380 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 14 predicate places. [2024-06-27 16:26:34,380 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 148 flow [2024-06-27 16:26:34,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:34,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:34,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:34,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 16:26:34,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:34,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1389849294, now seen corresponding path program 1 times [2024-06-27 16:26:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728515402] [2024-06-27 16:26:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:34,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:34,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:34,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728515402] [2024-06-27 16:26:34,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728515402] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:34,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998712063] [2024-06-27 16:26:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:34,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:34,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:34,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:26:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:34,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:26:34,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:34,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998712063] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:34,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:26:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-06-27 16:26:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340468961] [2024-06-27 16:26:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:26:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:26:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:26:34,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:34,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:34,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:34,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:34,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:35,053 INFO L124 PetriNetUnfolderBase]: 353/636 cut-off events. [2024-06-27 16:26:35,053 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-27 16:26:35,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 636 events. 353/636 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2845 event pairs, 138 based on Foata normal form. 0/612 useless extension candidates. Maximal degree in co-relation 1618. Up to 223 conditions per place. [2024-06-27 16:26:35,058 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 16:26:35,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 368 flow [2024-06-27 16:26:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 16:26:35,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-06-27 16:26:35,059 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 148 flow. Second operand 7 states and 87 transitions. [2024-06-27 16:26:35,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 368 flow [2024-06-27 16:26:35,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 16:26:35,061 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 162 flow [2024-06-27 16:26:35,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-06-27 16:26:35,062 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-06-27 16:26:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 162 flow [2024-06-27 16:26:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:35,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:35,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:35,274 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,SelfDestructingSolverStorable6 [2024-06-27 16:26:35,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 857225227, now seen corresponding path program 1 times [2024-06-27 16:26:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:35,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370425268] [2024-06-27 16:26:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370425268] [2024-06-27 16:26:35,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370425268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:35,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:35,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315524616] [2024-06-27 16:26:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:35,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:35,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:35,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:35,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:35,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:35,673 INFO L124 PetriNetUnfolderBase]: 365/655 cut-off events. [2024-06-27 16:26:35,674 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2024-06-27 16:26:35,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 655 events. 365/655 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2852 event pairs, 102 based on Foata normal form. 5/659 useless extension candidates. Maximal degree in co-relation 1778. Up to 536 conditions per place. [2024-06-27 16:26:35,677 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 40 selfloop transitions, 11 changer transitions 6/60 dead transitions. [2024-06-27 16:26:35,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 361 flow [2024-06-27 16:26:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 16:26:35,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-06-27 16:26:35,678 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 162 flow. Second operand 7 states and 87 transitions. [2024-06-27 16:26:35,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 361 flow [2024-06-27 16:26:35,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 341 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:35,681 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 228 flow [2024-06-27 16:26:35,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-27 16:26:35,681 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2024-06-27 16:26:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 228 flow [2024-06-27 16:26:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 16:26:35,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:35,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1135586795, now seen corresponding path program 2 times [2024-06-27 16:26:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031823820] [2024-06-27 16:26:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:35,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031823820] [2024-06-27 16:26:35,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031823820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:35,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:35,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:35,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411147520] [2024-06-27 16:26:35,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:35,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:35,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:35,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:35,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:35,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:35,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:36,101 INFO L124 PetriNetUnfolderBase]: 363/652 cut-off events. [2024-06-27 16:26:36,101 INFO L125 PetriNetUnfolderBase]: For 691/691 co-relation queries the response was YES. [2024-06-27 16:26:36,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 652 events. 363/652 cut-off events. For 691/691 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2882 event pairs, 75 based on Foata normal form. 5/657 useless extension candidates. Maximal degree in co-relation 2024. Up to 536 conditions per place. [2024-06-27 16:26:36,104 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 42 selfloop transitions, 10 changer transitions 10/65 dead transitions. [2024-06-27 16:26:36,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 441 flow [2024-06-27 16:26:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-27 16:26:36,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-06-27 16:26:36,106 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 228 flow. Second operand 7 states and 89 transitions. [2024-06-27 16:26:36,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 441 flow [2024-06-27 16:26:36,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 411 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 16:26:36,110 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 243 flow [2024-06-27 16:26:36,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-06-27 16:26:36,111 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-06-27 16:26:36,111 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 243 flow [2024-06-27 16:26:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:36,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:36,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 16:26:36,112 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:36,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1909171475, now seen corresponding path program 1 times [2024-06-27 16:26:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:36,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970332362] [2024-06-27 16:26:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:36,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:36,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970332362] [2024-06-27 16:26:36,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970332362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:36,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:36,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523120640] [2024-06-27 16:26:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:36,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:36,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:36,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:36,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 243 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:36,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:36,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:36,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:36,544 INFO L124 PetriNetUnfolderBase]: 357/646 cut-off events. [2024-06-27 16:26:36,545 INFO L125 PetriNetUnfolderBase]: For 814/820 co-relation queries the response was YES. [2024-06-27 16:26:36,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 646 events. 357/646 cut-off events. For 814/820 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2743 event pairs, 147 based on Foata normal form. 6/652 useless extension candidates. Maximal degree in co-relation 2033. Up to 536 conditions per place. [2024-06-27 16:26:36,548 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 37 selfloop transitions, 14 changer transitions 11/65 dead transitions. [2024-06-27 16:26:36,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 481 flow [2024-06-27 16:26:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-27 16:26:36,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 16:26:36,549 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 243 flow. Second operand 7 states and 86 transitions. [2024-06-27 16:26:36,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 481 flow [2024-06-27 16:26:36,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 443 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:36,552 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 304 flow [2024-06-27 16:26:36,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=304, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-06-27 16:26:36,553 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-06-27 16:26:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 304 flow [2024-06-27 16:26:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:36,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:36,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:36,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 16:26:36,553 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:36,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1424687657, now seen corresponding path program 2 times [2024-06-27 16:26:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:36,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609278359] [2024-06-27 16:26:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:36,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:36,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609278359] [2024-06-27 16:26:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609278359] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548396942] [2024-06-27 16:26:36,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:26:36,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:36,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:36,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:26:36,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:36,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:36,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:26:36,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:37,027 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:26:37,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:26:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:37,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:37,116 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:26:37,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:26:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548396942] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:37,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:37,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-06-27 16:26:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377538439] [2024-06-27 16:26:37,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:26:37,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:26:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:26:37,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:37,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:37,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:37,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:37,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:37,335 INFO L124 PetriNetUnfolderBase]: 369/668 cut-off events. [2024-06-27 16:26:37,335 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2024-06-27 16:26:37,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 668 events. 369/668 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2890 event pairs, 45 based on Foata normal form. 14/682 useless extension candidates. Maximal degree in co-relation 2167. Up to 388 conditions per place. [2024-06-27 16:26:37,339 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 54 selfloop transitions, 16 changer transitions 3/76 dead transitions. [2024-06-27 16:26:37,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 565 flow [2024-06-27 16:26:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:26:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:26:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-27 16:26:37,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 16:26:37,341 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 304 flow. Second operand 8 states and 105 transitions. [2024-06-27 16:26:37,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 565 flow [2024-06-27 16:26:37,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 550 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:37,344 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 333 flow [2024-06-27 16:26:37,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-27 16:26:37,345 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-06-27 16:26:37,345 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 333 flow [2024-06-27 16:26:37,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:37,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:37,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:37,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:37,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:37,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash -98403989, now seen corresponding path program 3 times [2024-06-27 16:26:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055749171] [2024-06-27 16:26:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:37,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055749171] [2024-06-27 16:26:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055749171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:37,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:37,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508544743] [2024-06-27 16:26:37,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:37,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:37,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:37,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 333 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:37,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:37,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:37,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:37,958 INFO L124 PetriNetUnfolderBase]: 364/663 cut-off events. [2024-06-27 16:26:37,958 INFO L125 PetriNetUnfolderBase]: For 1324/1334 co-relation queries the response was YES. [2024-06-27 16:26:37,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 663 events. 364/663 cut-off events. For 1324/1334 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2875 event pairs, 131 based on Foata normal form. 9/672 useless extension candidates. Maximal degree in co-relation 2220. Up to 565 conditions per place. [2024-06-27 16:26:37,962 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 34 selfloop transitions, 14 changer transitions 10/61 dead transitions. [2024-06-27 16:26:37,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 498 flow [2024-06-27 16:26:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 16:26:37,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-06-27 16:26:37,963 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 333 flow. Second operand 7 states and 83 transitions. [2024-06-27 16:26:37,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 498 flow [2024-06-27 16:26:37,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 448 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 16:26:37,967 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 311 flow [2024-06-27 16:26:37,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-06-27 16:26:37,968 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2024-06-27 16:26:37,968 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 311 flow [2024-06-27 16:26:37,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:37,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:37,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:37,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 16:26:37,969 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:37,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash 337700793, now seen corresponding path program 3 times [2024-06-27 16:26:37,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:37,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499162454] [2024-06-27 16:26:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:38,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:38,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499162454] [2024-06-27 16:26:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499162454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:38,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:38,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:38,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687113880] [2024-06-27 16:26:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:38,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:38,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:38,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:38,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:38,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:38,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:38,333 INFO L124 PetriNetUnfolderBase]: 340/613 cut-off events. [2024-06-27 16:26:38,333 INFO L125 PetriNetUnfolderBase]: For 862/862 co-relation queries the response was YES. [2024-06-27 16:26:38,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 613 events. 340/613 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2535 event pairs, 134 based on Foata normal form. 4/617 useless extension candidates. Maximal degree in co-relation 1996. Up to 565 conditions per place. [2024-06-27 16:26:38,336 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 37 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2024-06-27 16:26:38,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 437 flow [2024-06-27 16:26:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 16:26:38,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 16:26:38,337 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 311 flow. Second operand 7 states and 78 transitions. [2024-06-27 16:26:38,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 437 flow [2024-06-27 16:26:38,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 398 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 16:26:38,341 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 286 flow [2024-06-27 16:26:38,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-06-27 16:26:38,342 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-06-27 16:26:38,342 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 286 flow [2024-06-27 16:26:38,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:38,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:38,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:38,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:26:38,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:38,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:38,343 INFO L85 PathProgramCache]: Analyzing trace with hash 779947237, now seen corresponding path program 4 times [2024-06-27 16:26:38,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:38,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892279724] [2024-06-27 16:26:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:38,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:38,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892279724] [2024-06-27 16:26:38,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892279724] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:38,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093397911] [2024-06-27 16:26:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:26:38,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:38,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:38,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:38,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:26:38,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:26:38,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:38,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:26:38,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:38,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:38,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-06-27 16:26:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:38,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:38,810 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:26:38,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:26:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:38,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093397911] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:38,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:38,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-06-27 16:26:38,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842417451] [2024-06-27 16:26:38,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:38,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:26:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:26:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:26:38,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 286 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:38,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:38,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:38,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:39,067 INFO L124 PetriNetUnfolderBase]: 424/758 cut-off events. [2024-06-27 16:26:39,068 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2024-06-27 16:26:39,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 758 events. 424/758 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3358 event pairs, 102 based on Foata normal form. 21/779 useless extension candidates. Maximal degree in co-relation 2459. Up to 600 conditions per place. [2024-06-27 16:26:39,072 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 61 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2024-06-27 16:26:39,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 601 flow [2024-06-27 16:26:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:26:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:26:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 16:26:39,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-27 16:26:39,073 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 286 flow. Second operand 11 states and 130 transitions. [2024-06-27 16:26:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 601 flow [2024-06-27 16:26:39,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 577 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:39,076 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 388 flow [2024-06-27 16:26:39,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-06-27 16:26:39,077 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-06-27 16:26:39,077 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 388 flow [2024-06-27 16:26:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:39,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:39,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:39,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:39,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:39,291 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:39,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1525908377, now seen corresponding path program 4 times [2024-06-27 16:26:39,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:39,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110162683] [2024-06-27 16:26:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:39,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:39,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110162683] [2024-06-27 16:26:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110162683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:39,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:39,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:39,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987768110] [2024-06-27 16:26:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:39,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:39,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:39,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:39,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:39,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:39,677 INFO L124 PetriNetUnfolderBase]: 442/788 cut-off events. [2024-06-27 16:26:39,677 INFO L125 PetriNetUnfolderBase]: For 1727/1727 co-relation queries the response was YES. [2024-06-27 16:26:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 788 events. 442/788 cut-off events. For 1727/1727 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3514 event pairs, 151 based on Foata normal form. 12/800 useless extension candidates. Maximal degree in co-relation 2841. Up to 725 conditions per place. [2024-06-27 16:26:39,681 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-06-27 16:26:39,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 574 flow [2024-06-27 16:26:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-27 16:26:39,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 16:26:39,682 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 388 flow. Second operand 7 states and 82 transitions. [2024-06-27 16:26:39,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 574 flow [2024-06-27 16:26:39,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 548 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:39,686 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 402 flow [2024-06-27 16:26:39,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-06-27 16:26:39,687 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-06-27 16:26:39,687 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 402 flow [2024-06-27 16:26:39,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:39,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:39,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 16:26:39,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:39,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1300987723, now seen corresponding path program 5 times [2024-06-27 16:26:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455922203] [2024-06-27 16:26:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:39,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455922203] [2024-06-27 16:26:39,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455922203] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017331576] [2024-06-27 16:26:39,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:26:39,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:39,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:39,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:39,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:26:39,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:39,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:39,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:26:39,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:40,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:40,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-06-27 16:26:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:40,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:40,158 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:26:40,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:26:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:40,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017331576] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:40,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:26:40,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2024-06-27 16:26:40,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260062697] [2024-06-27 16:26:40,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:40,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:26:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:40,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:26:40,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:26:40,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:40,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:40,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:40,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:40,319 INFO L124 PetriNetUnfolderBase]: 421/768 cut-off events. [2024-06-27 16:26:40,319 INFO L125 PetriNetUnfolderBase]: For 1829/1835 co-relation queries the response was YES. [2024-06-27 16:26:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 768 events. 421/768 cut-off events. For 1829/1835 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3489 event pairs, 105 based on Foata normal form. 27/795 useless extension candidates. Maximal degree in co-relation 2759. Up to 601 conditions per place. [2024-06-27 16:26:40,323 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-27 16:26:40,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 599 flow [2024-06-27 16:26:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:26:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:26:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-06-27 16:26:40,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 16:26:40,324 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 402 flow. Second operand 6 states and 79 transitions. [2024-06-27 16:26:40,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 599 flow [2024-06-27 16:26:40,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 575 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:40,328 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 410 flow [2024-06-27 16:26:40,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-06-27 16:26:40,329 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2024-06-27 16:26:40,329 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 410 flow [2024-06-27 16:26:40,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:40,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:40,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:40,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:26:40,542 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:40,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash -413633599, now seen corresponding path program 5 times [2024-06-27 16:26:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:40,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480389722] [2024-06-27 16:26:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480389722] [2024-06-27 16:26:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480389722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:40,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:40,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:40,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590143087] [2024-06-27 16:26:40,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:40,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:40,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:40,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:40,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:40,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:40,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:40,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:40,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:40,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:40,941 INFO L124 PetriNetUnfolderBase]: 439/798 cut-off events. [2024-06-27 16:26:40,941 INFO L125 PetriNetUnfolderBase]: For 1994/2000 co-relation queries the response was YES. [2024-06-27 16:26:40,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 798 events. 439/798 cut-off events. For 1994/2000 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3672 event pairs, 136 based on Foata normal form. 18/816 useless extension candidates. Maximal degree in co-relation 2941. Up to 734 conditions per place. [2024-06-27 16:26:40,946 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 50 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-06-27 16:26:40,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 593 flow [2024-06-27 16:26:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-27 16:26:40,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 16:26:40,948 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 410 flow. Second operand 7 states and 80 transitions. [2024-06-27 16:26:40,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 593 flow [2024-06-27 16:26:40,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 571 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 16:26:40,953 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 432 flow [2024-06-27 16:26:40,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2024-06-27 16:26:40,953 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-06-27 16:26:40,953 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 432 flow [2024-06-27 16:26:40,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:40,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:40,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:40,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 16:26:40,954 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:40,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:40,954 INFO L85 PathProgramCache]: Analyzing trace with hash -431005725, now seen corresponding path program 6 times [2024-06-27 16:26:40,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:40,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76337626] [2024-06-27 16:26:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:40,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:41,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:41,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76337626] [2024-06-27 16:26:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76337626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:41,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:41,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634650410] [2024-06-27 16:26:41,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:41,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:41,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:41,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:41,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:41,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:41,337 INFO L124 PetriNetUnfolderBase]: 396/704 cut-off events. [2024-06-27 16:26:41,338 INFO L125 PetriNetUnfolderBase]: For 2085/2091 co-relation queries the response was YES. [2024-06-27 16:26:41,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 704 events. 396/704 cut-off events. For 2085/2091 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3057 event pairs, 115 based on Foata normal form. 10/714 useless extension candidates. Maximal degree in co-relation 2726. Up to 663 conditions per place. [2024-06-27 16:26:41,341 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 44 selfloop transitions, 11 changer transitions 3/61 dead transitions. [2024-06-27 16:26:41,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 61 transitions, 546 flow [2024-06-27 16:26:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-06-27 16:26:41,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 16:26:41,343 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 432 flow. Second operand 7 states and 74 transitions. [2024-06-27 16:26:41,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 61 transitions, 546 flow [2024-06-27 16:26:41,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 520 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:41,346 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 406 flow [2024-06-27 16:26:41,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2024-06-27 16:26:41,347 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-06-27 16:26:41,347 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 406 flow [2024-06-27 16:26:41,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:41,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:41,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 16:26:41,350 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:41,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2085142019, now seen corresponding path program 6 times [2024-06-27 16:26:41,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514054228] [2024-06-27 16:26:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514054228] [2024-06-27 16:26:41,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514054228] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:41,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675421462] [2024-06-27 16:26:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:26:41,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:41,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:41,577 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:41,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:26:41,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:26:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:41,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:26:41,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:41,729 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:26:41,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:26:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:41,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:41,799 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:26:41,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:26:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:41,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675421462] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:41,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:41,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-06-27 16:26:41,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600596979] [2024-06-27 16:26:41,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:41,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:26:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:26:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:26:41,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:41,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 406 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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 16:26:41,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:41,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:41,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:42,004 INFO L124 PetriNetUnfolderBase]: 352/620 cut-off events. [2024-06-27 16:26:42,004 INFO L125 PetriNetUnfolderBase]: For 1752/1758 co-relation queries the response was YES. [2024-06-27 16:26:42,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 620 events. 352/620 cut-off events. For 1752/1758 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2539 event pairs, 80 based on Foata normal form. 18/638 useless extension candidates. Maximal degree in co-relation 2434. Up to 497 conditions per place. [2024-06-27 16:26:42,008 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 51 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-27 16:26:42,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 611 flow [2024-06-27 16:26:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:26:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:26:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-27 16:26:42,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-06-27 16:26:42,009 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 406 flow. Second operand 8 states and 89 transitions. [2024-06-27 16:26:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 611 flow [2024-06-27 16:26:42,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 589 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 16:26:42,013 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 418 flow [2024-06-27 16:26:42,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2024-06-27 16:26:42,013 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2024-06-27 16:26:42,014 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 418 flow [2024-06-27 16:26:42,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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 16:26:42,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:42,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:42,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:42,226 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:42,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2105778690, now seen corresponding path program 1 times [2024-06-27 16:26:42,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:42,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957199425] [2024-06-27 16:26:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:42,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957199425] [2024-06-27 16:26:42,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957199425] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731567079] [2024-06-27 16:26:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:42,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:42,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:42,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:26:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:42,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:26:42,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:42,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731567079] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:42,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:42,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-06-27 16:26:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247614053] [2024-06-27 16:26:42,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:42,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:26:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:26:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:26:42,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:42,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 53 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:42,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:42,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:42,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:42,631 INFO L124 PetriNetUnfolderBase]: 758/1332 cut-off events. [2024-06-27 16:26:42,631 INFO L125 PetriNetUnfolderBase]: For 3857/3863 co-relation queries the response was YES. [2024-06-27 16:26:42,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 1332 events. 758/1332 cut-off events. For 3857/3863 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6576 event pairs, 96 based on Foata normal form. 14/1346 useless extension candidates. Maximal degree in co-relation 4949. Up to 549 conditions per place. [2024-06-27 16:26:42,638 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 83 selfloop transitions, 20 changer transitions 2/108 dead transitions. [2024-06-27 16:26:42,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 922 flow [2024-06-27 16:26:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 16:26:42,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2024-06-27 16:26:42,639 INFO L175 Difference]: Start difference. First operand has 73 places, 53 transitions, 418 flow. Second operand 7 states and 117 transitions. [2024-06-27 16:26:42,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 922 flow [2024-06-27 16:26:42,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 861 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 16:26:42,648 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 512 flow [2024-06-27 16:26:42,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-06-27 16:26:42,648 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-06-27 16:26:42,648 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 512 flow [2024-06-27 16:26:42,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:42,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:42,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:42,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:42,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:42,860 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:42,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:42,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1525261836, now seen corresponding path program 2 times [2024-06-27 16:26:42,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:42,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089343103] [2024-06-27 16:26:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:42,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089343103] [2024-06-27 16:26:42,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089343103] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:42,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22764287] [2024-06-27 16:26:42,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:26:42,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:42,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:26:42,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:42,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:26:42,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:43,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:43,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22764287] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:43,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:43,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-06-27 16:26:43,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527184369] [2024-06-27 16:26:43,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:26:43,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:43,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:26:43,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:26:43,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:43,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:43,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:43,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:43,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:43,265 INFO L124 PetriNetUnfolderBase]: 1190/2084 cut-off events. [2024-06-27 16:26:43,266 INFO L125 PetriNetUnfolderBase]: For 5846/5852 co-relation queries the response was YES. [2024-06-27 16:26:43,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 2084 events. 1190/2084 cut-off events. For 5846/5852 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11395 event pairs, 314 based on Foata normal form. 14/2097 useless extension candidates. Maximal degree in co-relation 7735. Up to 1335 conditions per place. [2024-06-27 16:26:43,281 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 94 selfloop transitions, 17 changer transitions 2/116 dead transitions. [2024-06-27 16:26:43,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1032 flow [2024-06-27 16:26:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 16:26:43,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-27 16:26:43,283 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 512 flow. Second operand 7 states and 114 transitions. [2024-06-27 16:26:43,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1032 flow [2024-06-27 16:26:43,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 1003 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:43,296 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 628 flow [2024-06-27 16:26:43,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-06-27 16:26:43,296 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2024-06-27 16:26:43,297 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 628 flow [2024-06-27 16:26:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:43,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:43,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:43,519 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,SelfDestructingSolverStorable20 [2024-06-27 16:26:43,519 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:43,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash -930481090, now seen corresponding path program 3 times [2024-06-27 16:26:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:43,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263370078] [2024-06-27 16:26:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263370078] [2024-06-27 16:26:43,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263370078] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:43,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450664145] [2024-06-27 16:26:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:26:43,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:43,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:43,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:26:43,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:26:43,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:43,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 16:26:43,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:43,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:44,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450664145] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:44,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:44,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 25 [2024-06-27 16:26:44,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168195794] [2024-06-27 16:26:44,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:44,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:26:44,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:26:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:26:44,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:44,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 628 flow. Second operand has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:44,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:44,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:44,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:45,508 INFO L124 PetriNetUnfolderBase]: 2343/4315 cut-off events. [2024-06-27 16:26:45,509 INFO L125 PetriNetUnfolderBase]: For 12610/12610 co-relation queries the response was YES. [2024-06-27 16:26:45,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16127 conditions, 4315 events. 2343/4315 cut-off events. For 12610/12610 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28619 event pairs, 362 based on Foata normal form. 208/4519 useless extension candidates. Maximal degree in co-relation 14995. Up to 892 conditions per place. [2024-06-27 16:26:45,524 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 196 selfloop transitions, 93 changer transitions 95/387 dead transitions. [2024-06-27 16:26:45,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 387 transitions, 3398 flow [2024-06-27 16:26:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-06-27 16:26:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-06-27 16:26:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 516 transitions. [2024-06-27 16:26:45,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 16:26:45,527 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 628 flow. Second operand 40 states and 516 transitions. [2024-06-27 16:26:45,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 387 transitions, 3398 flow [2024-06-27 16:26:45,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 387 transitions, 3279 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:45,558 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1575 flow [2024-06-27 16:26:45,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1575, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2024-06-27 16:26:45,559 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2024-06-27 16:26:45,559 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1575 flow [2024-06-27 16:26:45,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:45,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:45,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:45,573 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 16:26:45,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:45,771 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:45,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash 895194908, now seen corresponding path program 4 times [2024-06-27 16:26:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:45,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875057384] [2024-06-27 16:26:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:45,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875057384] [2024-06-27 16:26:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875057384] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676872821] [2024-06-27 16:26:45,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:26:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:45,855 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:45,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:26:45,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:26:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:45,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:26:45,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:46,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:26:46,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676872821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:46,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:26:46,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-06-27 16:26:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641179968] [2024-06-27 16:26:46,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:26:46,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:46,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:46,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:46,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:46,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:46,618 INFO L124 PetriNetUnfolderBase]: 2227/4153 cut-off events. [2024-06-27 16:26:46,618 INFO L125 PetriNetUnfolderBase]: For 29767/29767 co-relation queries the response was YES. [2024-06-27 16:26:46,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 4153 events. 2227/4153 cut-off events. For 29767/29767 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 28550 event pairs, 319 based on Foata normal form. 4/4157 useless extension candidates. Maximal degree in co-relation 18216. Up to 1710 conditions per place. [2024-06-27 16:26:46,643 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 151 selfloop transitions, 77 changer transitions 11/242 dead transitions. [2024-06-27 16:26:46,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 242 transitions, 3086 flow [2024-06-27 16:26:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 16:26:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 16:26:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-27 16:26:46,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 16:26:46,644 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1575 flow. Second operand 10 states and 120 transitions. [2024-06-27 16:26:46,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 242 transitions, 3086 flow [2024-06-27 16:26:46,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 242 transitions, 2830 flow, removed 106 selfloop flow, removed 14 redundant places. [2024-06-27 16:26:46,703 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1861 flow [2024-06-27 16:26:46,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1861, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-27 16:26:46,703 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 111 predicate places. [2024-06-27 16:26:46,703 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1861 flow [2024-06-27 16:26:46,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:46,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:46,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:46,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:46,915 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,SelfDestructingSolverStorable22 [2024-06-27 16:26:46,916 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:46,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash 739656916, now seen corresponding path program 5 times [2024-06-27 16:26:46,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:46,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988724594] [2024-06-27 16:26:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:46,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988724594] [2024-06-27 16:26:46,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988724594] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310084195] [2024-06-27 16:26:46,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:26:46,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:46,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:46,979 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:46,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:26:47,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:26:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:47,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:26:47,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:47,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:47,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310084195] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:47,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:47,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 16:26:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162589205] [2024-06-27 16:26:47,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:47,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:26:47,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:26:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:26:47,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:47,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1861 flow. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:47,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:47,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:47,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:47,597 INFO L124 PetriNetUnfolderBase]: 1905/3520 cut-off events. [2024-06-27 16:26:47,598 INFO L125 PetriNetUnfolderBase]: For 22919/22919 co-relation queries the response was YES. [2024-06-27 16:26:47,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16856 conditions, 3520 events. 1905/3520 cut-off events. For 22919/22919 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23091 event pairs, 1411 based on Foata normal form. 15/3535 useless extension candidates. Maximal degree in co-relation 16522. Up to 3356 conditions per place. [2024-06-27 16:26:47,621 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 132 selfloop transitions, 3 changer transitions 28/166 dead transitions. [2024-06-27 16:26:47,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 166 transitions, 2174 flow [2024-06-27 16:26:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-27 16:26:47,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2024-06-27 16:26:47,622 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1861 flow. Second operand 7 states and 79 transitions. [2024-06-27 16:26:47,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 166 transitions, 2174 flow [2024-06-27 16:26:47,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1997 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 16:26:47,684 INFO L231 Difference]: Finished difference. Result has 135 places, 138 transitions, 1457 flow [2024-06-27 16:26:47,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1457, PETRI_PLACES=135, PETRI_TRANSITIONS=138} [2024-06-27 16:26:47,685 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2024-06-27 16:26:47,685 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 138 transitions, 1457 flow [2024-06-27 16:26:47,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:47,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:47,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:47,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:47,891 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,SelfDestructingSolverStorable23 [2024-06-27 16:26:47,891 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:47,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:47,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1465117270, now seen corresponding path program 6 times [2024-06-27 16:26:47,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612943704] [2024-06-27 16:26:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:48,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:48,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612943704] [2024-06-27 16:26:48,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612943704] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:48,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229892742] [2024-06-27 16:26:48,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:26:48,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:48,004 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:48,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:26:48,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:26:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:48,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:26:48,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:48,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:48,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229892742] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:48,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:48,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-06-27 16:26:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771643214] [2024-06-27 16:26:48,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:48,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:26:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:26:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:26:48,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:48,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 138 transitions, 1457 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 16:26:48,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:48,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:48,531 INFO L124 PetriNetUnfolderBase]: 1748/3204 cut-off events. [2024-06-27 16:26:48,531 INFO L125 PetriNetUnfolderBase]: For 18874/18874 co-relation queries the response was YES. [2024-06-27 16:26:48,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14578 conditions, 3204 events. 1748/3204 cut-off events. For 18874/18874 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20408 event pairs, 711 based on Foata normal form. 10/3214 useless extension candidates. Maximal degree in co-relation 14522. Up to 2813 conditions per place. [2024-06-27 16:26:48,548 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 115 selfloop transitions, 16 changer transitions 27/161 dead transitions. [2024-06-27 16:26:48,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 161 transitions, 1897 flow [2024-06-27 16:26:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:26:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:26:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-27 16:26:48,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41517857142857145 [2024-06-27 16:26:48,549 INFO L175 Difference]: Start difference. First operand has 135 places, 138 transitions, 1457 flow. Second operand 8 states and 93 transitions. [2024-06-27 16:26:48,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 161 transitions, 1897 flow [2024-06-27 16:26:48,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 161 transitions, 1873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 16:26:48,590 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 1304 flow [2024-06-27 16:26:48,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1304, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2024-06-27 16:26:48,590 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 100 predicate places. [2024-06-27 16:26:48,590 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 1304 flow [2024-06-27 16:26:48,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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 16:26:48,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:48,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:48,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:48,801 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,SelfDestructingSolverStorable24 [2024-06-27 16:26:48,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:48,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 278839278, now seen corresponding path program 7 times [2024-06-27 16:26:48,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:48,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915683784] [2024-06-27 16:26:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:48,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915683784] [2024-06-27 16:26:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915683784] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366301215] [2024-06-27 16:26:48,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:26:48,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:48,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:48,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:48,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:26:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:49,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:26:49,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:49,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366301215] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:49,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 16:26:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760574816] [2024-06-27 16:26:49,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:26:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:26:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:26:49,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:49,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 1304 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:49,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:49,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:49,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:49,681 INFO L124 PetriNetUnfolderBase]: 1729/3139 cut-off events. [2024-06-27 16:26:49,682 INFO L125 PetriNetUnfolderBase]: For 18520/18524 co-relation queries the response was YES. [2024-06-27 16:26:49,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14364 conditions, 3139 events. 1729/3139 cut-off events. For 18520/18524 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19713 event pairs, 388 based on Foata normal form. 79/3218 useless extension candidates. Maximal degree in co-relation 14302. Up to 1182 conditions per place. [2024-06-27 16:26:49,771 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 116 selfloop transitions, 45 changer transitions 0/164 dead transitions. [2024-06-27 16:26:49,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 164 transitions, 1993 flow [2024-06-27 16:26:49,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:26:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:26:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-27 16:26:49,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-27 16:26:49,772 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 1304 flow. Second operand 11 states and 114 transitions. [2024-06-27 16:26:49,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 164 transitions, 1993 flow [2024-06-27 16:26:49,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 164 transitions, 1942 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 16:26:49,809 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 1358 flow [2024-06-27 16:26:49,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1358, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2024-06-27 16:26:49,810 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 102 predicate places. [2024-06-27 16:26:49,810 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 1358 flow [2024-06-27 16:26:49,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:49,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:49,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:49,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:50,022 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,SelfDestructingSolverStorable25 [2024-06-27 16:26:50,022 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:50,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -32640620, now seen corresponding path program 8 times [2024-06-27 16:26:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755216292] [2024-06-27 16:26:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:50,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755216292] [2024-06-27 16:26:50,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755216292] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417785565] [2024-06-27 16:26:50,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:26:50,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:50,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:50,150 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:26:50,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:50,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:50,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 16:26:50,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:50,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:26:50,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417785565] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:50,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:50,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 16:26:50,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891741689] [2024-06-27 16:26:50,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:50,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:26:50,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:26:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:26:50,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:50,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 1358 flow. Second operand has 22 states, 22 states have (on average 7.181818181818182) internal successors, (158), 22 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:50,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:50,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:50,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:50,916 INFO L124 PetriNetUnfolderBase]: 1950/3544 cut-off events. [2024-06-27 16:26:50,916 INFO L125 PetriNetUnfolderBase]: For 23116/23120 co-relation queries the response was YES. [2024-06-27 16:26:50,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17038 conditions, 3544 events. 1950/3544 cut-off events. For 23116/23120 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22384 event pairs, 592 based on Foata normal form. 66/3610 useless extension candidates. Maximal degree in co-relation 16974. Up to 1236 conditions per place. [2024-06-27 16:26:50,946 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 124 selfloop transitions, 53 changer transitions 0/180 dead transitions. [2024-06-27 16:26:50,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 2303 flow [2024-06-27 16:26:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:26:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:26:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-27 16:26:50,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-27 16:26:50,948 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 1358 flow. Second operand 11 states and 119 transitions. [2024-06-27 16:26:50,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 2303 flow [2024-06-27 16:26:51,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 180 transitions, 2240 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 16:26:51,038 INFO L231 Difference]: Finished difference. Result has 131 places, 131 transitions, 1619 flow [2024-06-27 16:26:51,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1619, PETRI_PLACES=131, PETRI_TRANSITIONS=131} [2024-06-27 16:26:51,038 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 105 predicate places. [2024-06-27 16:26:51,038 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 131 transitions, 1619 flow [2024-06-27 16:26:51,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.181818181818182) internal successors, (158), 22 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:51,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:51,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:51,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:51,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:51,250 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:51,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash 555207431, now seen corresponding path program 1 times [2024-06-27 16:26:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852097148] [2024-06-27 16:26:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:51,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:51,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852097148] [2024-06-27 16:26:51,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852097148] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:51,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083400749] [2024-06-27 16:26:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:51,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:51,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:51,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:26:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:51,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:26:51,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:51,875 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:26:51,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-06-27 16:26:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:51,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:51,966 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:26:51,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:26:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083400749] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:52,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-06-27 16:26:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064465925] [2024-06-27 16:26:52,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:26:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:26:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:26:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 131 transitions, 1619 flow. Second operand has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:52,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:52,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:52,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:52,856 INFO L124 PetriNetUnfolderBase]: 1990/3637 cut-off events. [2024-06-27 16:26:52,856 INFO L125 PetriNetUnfolderBase]: For 24313/24317 co-relation queries the response was YES. [2024-06-27 16:26:52,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17821 conditions, 3637 events. 1990/3637 cut-off events. For 24313/24317 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23265 event pairs, 673 based on Foata normal form. 14/3651 useless extension candidates. Maximal degree in co-relation 17755. Up to 2583 conditions per place. [2024-06-27 16:26:52,875 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 141 selfloop transitions, 42 changer transitions 34/220 dead transitions. [2024-06-27 16:26:52,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 220 transitions, 2724 flow [2024-06-27 16:26:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:26:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:26:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 204 transitions. [2024-06-27 16:26:52,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 16:26:52,876 INFO L175 Difference]: Start difference. First operand has 131 places, 131 transitions, 1619 flow. Second operand 17 states and 204 transitions. [2024-06-27 16:26:52,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 220 transitions, 2724 flow [2024-06-27 16:26:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2692 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 16:26:52,927 INFO L231 Difference]: Finished difference. Result has 147 places, 136 transitions, 1792 flow [2024-06-27 16:26:52,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1792, PETRI_PLACES=147, PETRI_TRANSITIONS=136} [2024-06-27 16:26:52,928 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 121 predicate places. [2024-06-27 16:26:52,928 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 136 transitions, 1792 flow [2024-06-27 16:26:52,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:52,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:52,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:52,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:53,139 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,SelfDestructingSolverStorable27 [2024-06-27 16:26:53,139 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:53,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1808304955, now seen corresponding path program 1 times [2024-06-27 16:26:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390641344] [2024-06-27 16:26:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390641344] [2024-06-27 16:26:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390641344] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27009308] [2024-06-27 16:26:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:53,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:53,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:53,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:53,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 16:26:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:53,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:26:53,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:53,685 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-27 16:26:53,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-06-27 16:26:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:53,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:53,780 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:26:53,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:26:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:53,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27009308] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:53,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:53,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-06-27 16:26:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809085928] [2024-06-27 16:26:53,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:26:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:26:53,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:26:53,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 136 transitions, 1792 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:54,663 INFO L124 PetriNetUnfolderBase]: 2282/4156 cut-off events. [2024-06-27 16:26:54,664 INFO L125 PetriNetUnfolderBase]: For 35223/35227 co-relation queries the response was YES. [2024-06-27 16:26:54,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21879 conditions, 4156 events. 2282/4156 cut-off events. For 35223/35227 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27106 event pairs, 553 based on Foata normal form. 46/4202 useless extension candidates. Maximal degree in co-relation 21805. Up to 2361 conditions per place. [2024-06-27 16:26:54,689 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 186 selfloop transitions, 58 changer transitions 1/248 dead transitions. [2024-06-27 16:26:54,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 3410 flow [2024-06-27 16:26:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:26:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:26:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 229 transitions. [2024-06-27 16:26:54,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2024-06-27 16:26:54,692 INFO L175 Difference]: Start difference. First operand has 147 places, 136 transitions, 1792 flow. Second operand 18 states and 229 transitions. [2024-06-27 16:26:54,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 3410 flow [2024-06-27 16:26:54,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 248 transitions, 3280 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-06-27 16:26:54,755 INFO L231 Difference]: Finished difference. Result has 149 places, 146 transitions, 1973 flow [2024-06-27 16:26:54,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1973, PETRI_PLACES=149, PETRI_TRANSITIONS=146} [2024-06-27 16:26:54,756 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-06-27 16:26:54,756 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 146 transitions, 1973 flow [2024-06-27 16:26:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:54,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:54,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 16:26:54,968 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:54,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2104518837, now seen corresponding path program 2 times [2024-06-27 16:26:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299855628] [2024-06-27 16:26:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:54,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:55,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:55,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299855628] [2024-06-27 16:26:55,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299855628] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:55,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299340739] [2024-06-27 16:26:55,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:26:55,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:55,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:55,426 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:55,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 16:26:55,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:55,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:55,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:26:55,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:55,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:55,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:26:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:55,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:55,781 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:26:55,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:26:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:55,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299340739] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:55,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:55,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 21 [2024-06-27 16:26:55,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776335619] [2024-06-27 16:26:55,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:55,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:26:55,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:26:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:26:55,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:55,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 146 transitions, 1973 flow. Second operand has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:55,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:55,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:55,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:57,025 INFO L124 PetriNetUnfolderBase]: 2661/4848 cut-off events. [2024-06-27 16:26:57,026 INFO L125 PetriNetUnfolderBase]: For 44528/44528 co-relation queries the response was YES. [2024-06-27 16:26:57,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26004 conditions, 4848 events. 2661/4848 cut-off events. For 44528/44528 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32637 event pairs, 819 based on Foata normal form. 30/4878 useless extension candidates. Maximal degree in co-relation 25931. Up to 3267 conditions per place. [2024-06-27 16:26:57,055 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 176 selfloop transitions, 82 changer transitions 8/269 dead transitions. [2024-06-27 16:26:57,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3651 flow [2024-06-27 16:26:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:26:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:26:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 256 transitions. [2024-06-27 16:26:57,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 16:26:57,056 INFO L175 Difference]: Start difference. First operand has 149 places, 146 transitions, 1973 flow. Second operand 21 states and 256 transitions. [2024-06-27 16:26:57,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3651 flow [2024-06-27 16:26:57,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 269 transitions, 3535 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 16:26:57,143 INFO L231 Difference]: Finished difference. Result has 166 places, 179 transitions, 2669 flow [2024-06-27 16:26:57,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2669, PETRI_PLACES=166, PETRI_TRANSITIONS=179} [2024-06-27 16:26:57,143 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 140 predicate places. [2024-06-27 16:26:57,143 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 179 transitions, 2669 flow [2024-06-27 16:26:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:57,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:57,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:57,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-06-27 16:26:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:57,355 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:57,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1741214893, now seen corresponding path program 3 times [2024-06-27 16:26:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263401166] [2024-06-27 16:26:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263401166] [2024-06-27 16:26:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263401166] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:57,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785738166] [2024-06-27 16:26:57,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:26:57,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:57,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:57,681 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:57,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 16:26:57,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:26:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:57,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:26:57,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:57,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:57,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:26:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:57,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:58,054 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:26:58,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:26:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:26:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785738166] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:58,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:58,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 7] total 22 [2024-06-27 16:26:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244011382] [2024-06-27 16:26:58,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:58,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:26:58,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:26:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:26:58,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:26:58,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 179 transitions, 2669 flow. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:58,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:58,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:26:58,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:59,265 INFO L124 PetriNetUnfolderBase]: 2517/4602 cut-off events. [2024-06-27 16:26:59,266 INFO L125 PetriNetUnfolderBase]: For 64840/64840 co-relation queries the response was YES. [2024-06-27 16:26:59,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27636 conditions, 4602 events. 2517/4602 cut-off events. For 64840/64840 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30847 event pairs, 783 based on Foata normal form. 48/4650 useless extension candidates. Maximal degree in co-relation 27554. Up to 3267 conditions per place. [2024-06-27 16:26:59,294 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 163 selfloop transitions, 78 changer transitions 2/246 dead transitions. [2024-06-27 16:26:59,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 246 transitions, 3641 flow [2024-06-27 16:26:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:26:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:26:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 216 transitions. [2024-06-27 16:26:59,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 16:26:59,296 INFO L175 Difference]: Start difference. First operand has 166 places, 179 transitions, 2669 flow. Second operand 18 states and 216 transitions. [2024-06-27 16:26:59,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 246 transitions, 3641 flow [2024-06-27 16:26:59,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 246 transitions, 3426 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-06-27 16:26:59,414 INFO L231 Difference]: Finished difference. Result has 170 places, 176 transitions, 2592 flow [2024-06-27 16:26:59,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2592, PETRI_PLACES=170, PETRI_TRANSITIONS=176} [2024-06-27 16:26:59,414 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-06-27 16:26:59,415 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 176 transitions, 2592 flow [2024-06-27 16:26:59,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:59,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:59,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:59,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-06-27 16:26:59,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:59,626 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:26:59,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash -508949035, now seen corresponding path program 4 times [2024-06-27 16:26:59,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107046518] [2024-06-27 16:26:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:59,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:59,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107046518] [2024-06-27 16:26:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107046518] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:59,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664634964] [2024-06-27 16:26:59,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:26:59,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:59,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:59,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:59,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 16:27:00,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:27:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:00,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:27:00,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:00,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:27:00,199 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:27:00,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-06-27 16:27:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:27:00,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:00,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:00,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-06-27 16:27:00,412 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:00,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-06-27 16:27:00,492 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:27:00,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 190 [2024-06-27 16:27:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:27:00,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664634964] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:00,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:00,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-06-27 16:27:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139730104] [2024-06-27 16:27:00,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:27:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:00,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:27:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:27:00,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:00,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 176 transitions, 2592 flow. Second operand has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:00,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:00,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:00,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:01,969 INFO L124 PetriNetUnfolderBase]: 2515/4588 cut-off events. [2024-06-27 16:27:01,970 INFO L125 PetriNetUnfolderBase]: For 58767/58767 co-relation queries the response was YES. [2024-06-27 16:27:01,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26942 conditions, 4588 events. 2515/4588 cut-off events. For 58767/58767 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30656 event pairs, 950 based on Foata normal form. 15/4603 useless extension candidates. Maximal degree in co-relation 26860. Up to 4099 conditions per place. [2024-06-27 16:27:02,000 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 181 selfloop transitions, 46 changer transitions 31/261 dead transitions. [2024-06-27 16:27:02,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 261 transitions, 3745 flow [2024-06-27 16:27:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:27:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:27:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 241 transitions. [2024-06-27 16:27:02,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098639455782313 [2024-06-27 16:27:02,002 INFO L175 Difference]: Start difference. First operand has 170 places, 176 transitions, 2592 flow. Second operand 21 states and 241 transitions. [2024-06-27 16:27:02,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 261 transitions, 3745 flow [2024-06-27 16:27:02,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 261 transitions, 3548 flow, removed 3 selfloop flow, removed 18 redundant places. [2024-06-27 16:27:02,104 INFO L231 Difference]: Finished difference. Result has 181 places, 182 transitions, 2703 flow [2024-06-27 16:27:02,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2703, PETRI_PLACES=181, PETRI_TRANSITIONS=182} [2024-06-27 16:27:02,105 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-06-27 16:27:02,105 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 182 transitions, 2703 flow [2024-06-27 16:27:02,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:02,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:02,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:02,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:02,316 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:02,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1128017449, now seen corresponding path program 2 times [2024-06-27 16:27:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:02,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421846877] [2024-06-27 16:27:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:02,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421846877] [2024-06-27 16:27:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421846877] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562074478] [2024-06-27 16:27:02,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:27:02,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:02,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:02,604 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:02,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 16:27:02,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:27:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:02,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:27:02,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:02,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:02,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:27:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:27:02,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:02,940 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:27:02,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:27:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562074478] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:02,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-27 16:27:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159920841] [2024-06-27 16:27:02,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:02,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:27:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:27:02,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:27:02,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:02,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 182 transitions, 2703 flow. Second operand has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:02,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:02,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:02,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:04,163 INFO L124 PetriNetUnfolderBase]: 2719/4952 cut-off events. [2024-06-27 16:27:04,163 INFO L125 PetriNetUnfolderBase]: For 66682/66682 co-relation queries the response was YES. [2024-06-27 16:27:04,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29356 conditions, 4952 events. 2719/4952 cut-off events. For 66682/66682 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 33283 event pairs, 818 based on Foata normal form. 16/4968 useless extension candidates. Maximal degree in co-relation 29266. Up to 3538 conditions per place. [2024-06-27 16:27:04,201 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 199 selfloop transitions, 99 changer transitions 11/312 dead transitions. [2024-06-27 16:27:04,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 312 transitions, 4559 flow [2024-06-27 16:27:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:27:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:27:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 307 transitions. [2024-06-27 16:27:04,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39158163265306123 [2024-06-27 16:27:04,204 INFO L175 Difference]: Start difference. First operand has 181 places, 182 transitions, 2703 flow. Second operand 28 states and 307 transitions. [2024-06-27 16:27:04,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 312 transitions, 4559 flow [2024-06-27 16:27:04,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 312 transitions, 4428 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-06-27 16:27:04,334 INFO L231 Difference]: Finished difference. Result has 197 places, 209 transitions, 3386 flow [2024-06-27 16:27:04,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3386, PETRI_PLACES=197, PETRI_TRANSITIONS=209} [2024-06-27 16:27:04,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2024-06-27 16:27:04,334 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 209 transitions, 3386 flow [2024-06-27 16:27:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:04,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:04,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:04,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:04,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-06-27 16:27:04,547 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:04,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1833896661, now seen corresponding path program 3 times [2024-06-27 16:27:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:04,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129726358] [2024-06-27 16:27:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:04,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129726358] [2024-06-27 16:27:04,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129726358] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898486227] [2024-06-27 16:27:04,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:27:04,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:04,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:04,833 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:04,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 16:27:04,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:27:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:04,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjunts are in the unsatisfiable core [2024-06-27 16:27:04,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:04,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:27:04,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:27:05,016 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:27:05,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:27:05,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 16:27:05,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 16:27:05,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2024-06-27 16:27:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:27:05,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:05,599 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-06-27 16:27:05,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-06-27 16:27:05,662 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_~i_BA~0 4)) (.cse3 (* c_~i_AB~0 4))) (let ((.cse0 (= c_~i_AB~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse6 (= c_~i_BA~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse2 (+ c_~A~0.offset 4 .cse3)) (.cse4 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse5 (+ c_~A~0.offset .cse9 4))) (and (or .cse0 (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse1 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse1 .cse5))))) (not .cse6)) (or .cse0 (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse5))) (or (not (= (select .cse7 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse8) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse8))))) (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse10 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse10 .cse5))))) .cse6))) (or (not .cse0) (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (let ((.cse12 (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (.cse13 (select .cse11 .cse5))) (or (not (= (select .cse11 .cse2) .cse12)) (= .cse12 .cse13) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse13))))) (or .cse6 (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse14 .cse2) (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse14 .cse5))))))))))) is different from false [2024-06-27 16:27:05,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:05,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-06-27 16:27:05,916 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:05,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 70 [2024-06-27 16:27:05,957 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-27 16:27:05,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2024-06-27 16:27:05,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:05,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-06-27 16:27:05,999 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:06,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 79 [2024-06-27 16:27:06,037 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2024-06-27 16:27:06,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 82 [2024-06-27 16:27:06,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:06,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2024-06-27 16:27:06,097 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:06,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 109 [2024-06-27 16:27:06,200 INFO L349 Elim1Store]: treesize reduction 24, result has 77.1 percent of original size [2024-06-27 16:27:06,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 129 [2024-06-27 16:27:06,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:06,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-06-27 16:27:06,278 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:06,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 70 [2024-06-27 16:27:06,335 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-27 16:27:06,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2024-06-27 16:27:06,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:06,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2024-06-27 16:27:06,372 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:06,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2024-06-27 16:27:06,406 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-27 16:27:06,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 89 [2024-06-27 16:27:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 2 not checked. [2024-06-27 16:27:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898486227] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:06,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-06-27 16:27:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959426009] [2024-06-27 16:27:06,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:06,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 16:27:06,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 16:27:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=834, Unknown=2, NotChecked=60, Total=1056 [2024-06-27 16:27:06,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:06,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 209 transitions, 3386 flow. Second operand has 33 states, 33 states have (on average 7.0) internal successors, (231), 33 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:06,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:06,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:06,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:09,114 INFO L124 PetriNetUnfolderBase]: 3609/6556 cut-off events. [2024-06-27 16:27:09,114 INFO L125 PetriNetUnfolderBase]: For 107359/107359 co-relation queries the response was YES. [2024-06-27 16:27:09,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41119 conditions, 6556 events. 3609/6556 cut-off events. For 107359/107359 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 46396 event pairs, 1013 based on Foata normal form. 70/6626 useless extension candidates. Maximal degree in co-relation 41026. Up to 4220 conditions per place. [2024-06-27 16:27:09,161 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 313 selfloop transitions, 127 changer transitions 4/447 dead transitions. [2024-06-27 16:27:09,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 447 transitions, 7240 flow [2024-06-27 16:27:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 16:27:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 16:27:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 411 transitions. [2024-06-27 16:27:09,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317226890756303 [2024-06-27 16:27:09,163 INFO L175 Difference]: Start difference. First operand has 197 places, 209 transitions, 3386 flow. Second operand 34 states and 411 transitions. [2024-06-27 16:27:09,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 447 transitions, 7240 flow [2024-06-27 16:27:09,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 447 transitions, 6863 flow, removed 125 selfloop flow, removed 17 redundant places. [2024-06-27 16:27:09,359 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 4924 flow [2024-06-27 16:27:09,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4924, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-27 16:27:09,360 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2024-06-27 16:27:09,360 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 4924 flow [2024-06-27 16:27:09,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.0) internal successors, (231), 33 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:09,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:09,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:09,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-06-27 16:27:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-06-27 16:27:09,572 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:09,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1276340903, now seen corresponding path program 4 times [2024-06-27 16:27:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:09,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041670690] [2024-06-27 16:27:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041670690] [2024-06-27 16:27:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041670690] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98464223] [2024-06-27 16:27:09,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:27:09,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:09,867 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:09,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 16:27:09,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:27:09,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:09,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 16:27:09,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:10,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:10,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 16:27:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:10,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:10,141 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:27:10,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:27:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:10,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98464223] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:10,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:10,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-06-27 16:27:10,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158197606] [2024-06-27 16:27:10,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:10,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:27:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:27:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:27:10,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:10,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 4924 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:10,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:10,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:10,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:11,851 INFO L124 PetriNetUnfolderBase]: 3492/6334 cut-off events. [2024-06-27 16:27:11,851 INFO L125 PetriNetUnfolderBase]: For 138348/138348 co-relation queries the response was YES. [2024-06-27 16:27:11,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42162 conditions, 6334 events. 3492/6334 cut-off events. For 138348/138348 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44705 event pairs, 893 based on Foata normal form. 140/6474 useless extension candidates. Maximal degree in co-relation 42058. Up to 4293 conditions per place. [2024-06-27 16:27:11,903 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 259 selfloop transitions, 150 changer transitions 10/422 dead transitions. [2024-06-27 16:27:11,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 422 transitions, 7297 flow [2024-06-27 16:27:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 16:27:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 16:27:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 356 transitions. [2024-06-27 16:27:11,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-06-27 16:27:11,905 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 4924 flow. Second operand 32 states and 356 transitions. [2024-06-27 16:27:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 422 transitions, 7297 flow [2024-06-27 16:27:12,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 422 transitions, 6681 flow, removed 243 selfloop flow, removed 19 redundant places. [2024-06-27 16:27:12,214 INFO L231 Difference]: Finished difference. Result has 239 places, 295 transitions, 5155 flow [2024-06-27 16:27:12,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5155, PETRI_PLACES=239, PETRI_TRANSITIONS=295} [2024-06-27 16:27:12,214 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 213 predicate places. [2024-06-27 16:27:12,215 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 295 transitions, 5155 flow [2024-06-27 16:27:12,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:12,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:12,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:12,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-06-27 16:27:12,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:12,426 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:12,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 936351649, now seen corresponding path program 5 times [2024-06-27 16:27:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416477633] [2024-06-27 16:27:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416477633] [2024-06-27 16:27:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416477633] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:12,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574286062] [2024-06-27 16:27:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:27:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:12,717 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:12,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 16:27:12,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:27:12,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:12,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:27:12,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:12,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:12,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 16:27:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:12,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:12,954 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:12,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:12,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574286062] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:12,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:12,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-06-27 16:27:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148670457] [2024-06-27 16:27:12,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:12,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:27:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:27:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:27:12,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:12,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 295 transitions, 5155 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:12,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:12,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:12,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:14,204 INFO L124 PetriNetUnfolderBase]: 3573/6491 cut-off events. [2024-06-27 16:27:14,205 INFO L125 PetriNetUnfolderBase]: For 122766/122768 co-relation queries the response was YES. [2024-06-27 16:27:14,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42552 conditions, 6491 events. 3573/6491 cut-off events. For 122766/122768 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 46016 event pairs, 1107 based on Foata normal form. 12/6503 useless extension candidates. Maximal degree in co-relation 42447. Up to 4839 conditions per place. [2024-06-27 16:27:14,392 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 259 selfloop transitions, 109 changer transitions 16/387 dead transitions. [2024-06-27 16:27:14,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 6991 flow [2024-06-27 16:27:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:27:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:27:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 248 transitions. [2024-06-27 16:27:14,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 16:27:14,409 INFO L175 Difference]: Start difference. First operand has 239 places, 295 transitions, 5155 flow. Second operand 22 states and 248 transitions. [2024-06-27 16:27:14,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 6991 flow [2024-06-27 16:27:14,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 387 transitions, 6679 flow, removed 15 selfloop flow, removed 24 redundant places. [2024-06-27 16:27:14,801 INFO L231 Difference]: Finished difference. Result has 241 places, 321 transitions, 5850 flow [2024-06-27 16:27:14,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4823, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5850, PETRI_PLACES=241, PETRI_TRANSITIONS=321} [2024-06-27 16:27:14,801 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 215 predicate places. [2024-06-27 16:27:14,801 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 321 transitions, 5850 flow [2024-06-27 16:27:14,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:14,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:14,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:14,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-06-27 16:27:15,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:15,004 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:15,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1964301891, now seen corresponding path program 6 times [2024-06-27 16:27:15,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:15,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691090266] [2024-06-27 16:27:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691090266] [2024-06-27 16:27:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691090266] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:15,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224067311] [2024-06-27 16:27:15,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:27:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:15,295 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:15,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 16:27:15,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:27:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:15,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:27:15,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:15,586 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:27:15,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:27:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:15,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:15,662 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:15,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:15,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224067311] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:15,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-06-27 16:27:15,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521622489] [2024-06-27 16:27:15,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:27:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:27:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:27:15,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:15,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 321 transitions, 5850 flow. Second operand has 22 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:15,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:15,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:15,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:17,242 INFO L124 PetriNetUnfolderBase]: 3886/7024 cut-off events. [2024-06-27 16:27:17,242 INFO L125 PetriNetUnfolderBase]: For 147880/147882 co-relation queries the response was YES. [2024-06-27 16:27:17,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47205 conditions, 7024 events. 3886/7024 cut-off events. For 147880/147882 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 50132 event pairs, 1029 based on Foata normal form. 78/7102 useless extension candidates. Maximal degree in co-relation 47095. Up to 4374 conditions per place. [2024-06-27 16:27:17,295 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 287 selfloop transitions, 138 changer transitions 2/430 dead transitions. [2024-06-27 16:27:17,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 430 transitions, 8178 flow [2024-06-27 16:27:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:27:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:27:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 244 transitions. [2024-06-27 16:27:17,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 16:27:17,297 INFO L175 Difference]: Start difference. First operand has 241 places, 321 transitions, 5850 flow. Second operand 20 states and 244 transitions. [2024-06-27 16:27:17,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 430 transitions, 8178 flow [2024-06-27 16:27:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 430 transitions, 7539 flow, removed 267 selfloop flow, removed 13 redundant places. [2024-06-27 16:27:17,798 INFO L231 Difference]: Finished difference. Result has 248 places, 337 transitions, 6071 flow [2024-06-27 16:27:17,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6071, PETRI_PLACES=248, PETRI_TRANSITIONS=337} [2024-06-27 16:27:17,798 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 222 predicate places. [2024-06-27 16:27:17,799 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 337 transitions, 6071 flow [2024-06-27 16:27:17,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:17,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:17,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:17,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:18,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 16:27:18,009 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:18,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1589704119, now seen corresponding path program 5 times [2024-06-27 16:27:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:18,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393732212] [2024-06-27 16:27:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:18,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:18,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393732212] [2024-06-27 16:27:18,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393732212] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:18,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101897743] [2024-06-27 16:27:18,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:27:18,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:18,260 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:18,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 16:27:18,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 16:27:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:18,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:27:18,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:18,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:18,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 16:27:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:18,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:18,521 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:18,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:18,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101897743] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:18,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:18,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-06-27 16:27:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548714759] [2024-06-27 16:27:18,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:18,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:27:18,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:27:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:27:18,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:18,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 337 transitions, 6071 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:18,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:18,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:18,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:20,639 INFO L124 PetriNetUnfolderBase]: 4214/7670 cut-off events. [2024-06-27 16:27:20,639 INFO L125 PetriNetUnfolderBase]: For 133050/133052 co-relation queries the response was YES. [2024-06-27 16:27:20,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49854 conditions, 7670 events. 4214/7670 cut-off events. For 133050/133052 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 56195 event pairs, 1310 based on Foata normal form. 26/7696 useless extension candidates. Maximal degree in co-relation 49742. Up to 5754 conditions per place. [2024-06-27 16:27:20,706 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 330 selfloop transitions, 121 changer transitions 10/464 dead transitions. [2024-06-27 16:27:20,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 464 transitions, 8229 flow [2024-06-27 16:27:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:27:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:27:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 311 transitions. [2024-06-27 16:27:20,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113756613756614 [2024-06-27 16:27:20,707 INFO L175 Difference]: Start difference. First operand has 248 places, 337 transitions, 6071 flow. Second operand 27 states and 311 transitions. [2024-06-27 16:27:20,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 464 transitions, 8229 flow [2024-06-27 16:27:21,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 464 transitions, 7876 flow, removed 45 selfloop flow, removed 17 redundant places. [2024-06-27 16:27:21,194 INFO L231 Difference]: Finished difference. Result has 264 places, 365 transitions, 6680 flow [2024-06-27 16:27:21,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6680, PETRI_PLACES=264, PETRI_TRANSITIONS=365} [2024-06-27 16:27:21,194 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 238 predicate places. [2024-06-27 16:27:21,195 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 365 transitions, 6680 flow [2024-06-27 16:27:21,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:21,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:21,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:21,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 16:27:21,408 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:21,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1031048031, now seen corresponding path program 7 times [2024-06-27 16:27:21,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:21,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762507309] [2024-06-27 16:27:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:21,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762507309] [2024-06-27 16:27:21,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762507309] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254257127] [2024-06-27 16:27:21,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:27:21,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:21,660 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:21,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 16:27:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:21,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:27:21,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:21,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:21,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 16:27:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:21,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:21,920 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:21,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:21,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254257127] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:21,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:21,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-06-27 16:27:21,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099820743] [2024-06-27 16:27:21,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:21,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 16:27:21,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 16:27:21,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-06-27 16:27:21,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:21,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 365 transitions, 6680 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:21,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:21,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:21,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:23,982 INFO L124 PetriNetUnfolderBase]: 4029/7322 cut-off events. [2024-06-27 16:27:23,983 INFO L125 PetriNetUnfolderBase]: For 134143/134145 co-relation queries the response was YES. [2024-06-27 16:27:24,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48361 conditions, 7322 events. 4029/7322 cut-off events. For 134143/134145 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 53009 event pairs, 1299 based on Foata normal form. 50/7372 useless extension candidates. Maximal degree in co-relation 48244. Up to 5582 conditions per place. [2024-06-27 16:27:24,047 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 294 selfloop transitions, 122 changer transitions 2/421 dead transitions. [2024-06-27 16:27:24,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 421 transitions, 7876 flow [2024-06-27 16:27:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 16:27:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 16:27:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 230 transitions. [2024-06-27 16:27:24,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 16:27:24,048 INFO L175 Difference]: Start difference. First operand has 264 places, 365 transitions, 6680 flow. Second operand 21 states and 230 transitions. [2024-06-27 16:27:24,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 421 transitions, 7876 flow [2024-06-27 16:27:24,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 421 transitions, 7636 flow, removed 88 selfloop flow, removed 12 redundant places. [2024-06-27 16:27:24,565 INFO L231 Difference]: Finished difference. Result has 270 places, 365 transitions, 6689 flow [2024-06-27 16:27:24,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6689, PETRI_PLACES=270, PETRI_TRANSITIONS=365} [2024-06-27 16:27:24,566 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 244 predicate places. [2024-06-27 16:27:24,566 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 365 transitions, 6689 flow [2024-06-27 16:27:24,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:24,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:24,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:24,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-06-27 16:27:24,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 16:27:24,778 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:24,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:24,779 INFO L85 PathProgramCache]: Analyzing trace with hash -812211079, now seen corresponding path program 6 times [2024-06-27 16:27:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442502257] [2024-06-27 16:27:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:25,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442502257] [2024-06-27 16:27:25,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442502257] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:25,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418014001] [2024-06-27 16:27:25,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:27:25,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:25,069 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:25,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 16:27:25,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:27:25,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:25,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:27:25,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:25,347 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:27:25,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:27:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:25,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:25,418 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:25,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:27:25,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418014001] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:25,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:25,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-06-27 16:27:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768663744] [2024-06-27 16:27:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:25,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:27:25,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:27:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:27:25,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 365 transitions, 6689 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:25,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:27,989 INFO L124 PetriNetUnfolderBase]: 4859/8864 cut-off events. [2024-06-27 16:27:27,989 INFO L125 PetriNetUnfolderBase]: For 152249/152249 co-relation queries the response was YES. [2024-06-27 16:27:28,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 8864 events. 4859/8864 cut-off events. For 152249/152249 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65374 event pairs, 1204 based on Foata normal form. 105/8969 useless extension candidates. Maximal degree in co-relation 57347. Up to 5198 conditions per place. [2024-06-27 16:27:28,072 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 427 selfloop transitions, 189 changer transitions 8/627 dead transitions. [2024-06-27 16:27:28,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 627 transitions, 11730 flow [2024-06-27 16:27:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:27:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:27:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 396 transitions. [2024-06-27 16:27:28,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-06-27 16:27:28,074 INFO L175 Difference]: Start difference. First operand has 270 places, 365 transitions, 6689 flow. Second operand 29 states and 396 transitions. [2024-06-27 16:27:28,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 627 transitions, 11730 flow [2024-06-27 16:27:28,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 627 transitions, 11366 flow, removed 18 selfloop flow, removed 18 redundant places. [2024-06-27 16:27:28,677 INFO L231 Difference]: Finished difference. Result has 288 places, 432 transitions, 8478 flow [2024-06-27 16:27:28,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8478, PETRI_PLACES=288, PETRI_TRANSITIONS=432} [2024-06-27 16:27:28,678 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 262 predicate places. [2024-06-27 16:27:28,678 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 432 transitions, 8478 flow [2024-06-27 16:27:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:28,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:28,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:28,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:28,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 16:27:28,881 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:28,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash 685513861, now seen corresponding path program 7 times [2024-06-27 16:27:28,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:28,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972852808] [2024-06-27 16:27:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:28,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:29,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:29,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972852808] [2024-06-27 16:27:29,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972852808] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612627292] [2024-06-27 16:27:29,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:27:29,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:29,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:29,171 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:29,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 16:27:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:29,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:27:29,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:29,366 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:27:29,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-06-27 16:27:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:29,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:29,435 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:29,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:29,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612627292] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:29,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:29,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-27 16:27:29,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944133285] [2024-06-27 16:27:29,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:29,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:27:29,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:27:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:27:29,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:29,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 432 transitions, 8478 flow. Second operand has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:29,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:29,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:29,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:31,675 INFO L124 PetriNetUnfolderBase]: 4799/8744 cut-off events. [2024-06-27 16:27:31,676 INFO L125 PetriNetUnfolderBase]: For 160709/160711 co-relation queries the response was YES. [2024-06-27 16:27:31,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 8744 events. 4799/8744 cut-off events. For 160709/160711 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64584 event pairs, 1523 based on Foata normal form. 14/8758 useless extension candidates. Maximal degree in co-relation 57899. Up to 6688 conditions per place. [2024-06-27 16:27:31,754 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 324 selfloop transitions, 124 changer transitions 18/469 dead transitions. [2024-06-27 16:27:31,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 469 transitions, 9488 flow [2024-06-27 16:27:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:27:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:27:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 186 transitions. [2024-06-27 16:27:31,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907563025210084 [2024-06-27 16:27:31,756 INFO L175 Difference]: Start difference. First operand has 288 places, 432 transitions, 8478 flow. Second operand 17 states and 186 transitions. [2024-06-27 16:27:31,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 469 transitions, 9488 flow [2024-06-27 16:27:32,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 469 transitions, 9160 flow, removed 94 selfloop flow, removed 15 redundant places. [2024-06-27 16:27:32,464 INFO L231 Difference]: Finished difference. Result has 289 places, 424 transitions, 8247 flow [2024-06-27 16:27:32,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8247, PETRI_PLACES=289, PETRI_TRANSITIONS=424} [2024-06-27 16:27:32,465 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 263 predicate places. [2024-06-27 16:27:32,465 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 424 transitions, 8247 flow [2024-06-27 16:27:32,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:32,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:32,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:32,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:32,668 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:32,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -247561881, now seen corresponding path program 8 times [2024-06-27 16:27:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:32,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096558228] [2024-06-27 16:27:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:32,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:32,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:32,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096558228] [2024-06-27 16:27:32,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096558228] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:32,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801347426] [2024-06-27 16:27:32,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:27:32,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:32,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:32,932 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:32,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 16:27:33,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:27:33,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:33,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:27:33,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:33,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:33,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:27:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:27:33,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:33,263 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:33,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801347426] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:33,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-27 16:27:33,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299290839] [2024-06-27 16:27:33,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:33,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:27:33,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:27:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:27:33,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:33,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 424 transitions, 8247 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:33,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:33,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:33,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:35,323 INFO L124 PetriNetUnfolderBase]: 4331/7827 cut-off events. [2024-06-27 16:27:35,324 INFO L125 PetriNetUnfolderBase]: For 150144/150146 co-relation queries the response was YES. [2024-06-27 16:27:35,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53145 conditions, 7827 events. 4331/7827 cut-off events. For 150144/150146 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 55958 event pairs, 1321 based on Foata normal form. 107/7934 useless extension candidates. Maximal degree in co-relation 53023. Up to 6026 conditions per place. [2024-06-27 16:27:35,406 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 313 selfloop transitions, 144 changer transitions 3/463 dead transitions. [2024-06-27 16:27:35,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 463 transitions, 9364 flow [2024-06-27 16:27:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:27:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:27:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 209 transitions. [2024-06-27 16:27:35,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 16:27:35,408 INFO L175 Difference]: Start difference. First operand has 289 places, 424 transitions, 8247 flow. Second operand 19 states and 209 transitions. [2024-06-27 16:27:35,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 463 transitions, 9364 flow [2024-06-27 16:27:35,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 463 transitions, 9030 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-06-27 16:27:35,987 INFO L231 Difference]: Finished difference. Result has 285 places, 412 transitions, 8084 flow [2024-06-27 16:27:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7785, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8084, PETRI_PLACES=285, PETRI_TRANSITIONS=412} [2024-06-27 16:27:35,988 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 259 predicate places. [2024-06-27 16:27:35,988 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 412 transitions, 8084 flow [2024-06-27 16:27:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:36,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:36,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:36,196 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:36,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1278345783, now seen corresponding path program 9 times [2024-06-27 16:27:36,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:36,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155020620] [2024-06-27 16:27:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:36,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:36,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:36,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155020620] [2024-06-27 16:27:36,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155020620] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:36,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876259738] [2024-06-27 16:27:36,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:27:36,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:36,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:36,611 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:36,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 16:27:36,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:27:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:36,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:27:36,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:36,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:27:36,947 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:27:36,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-27 16:27:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:27:36,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:37,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:37,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-06-27 16:27:37,140 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:27:37,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-06-27 16:27:37,203 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-27 16:27:37,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 185 [2024-06-27 16:27:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:27:37,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876259738] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:37,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:37,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2024-06-27 16:27:37,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358839018] [2024-06-27 16:27:37,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:37,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:27:37,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:27:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:27:37,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:37,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 412 transitions, 8084 flow. Second operand has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:37,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:37,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:37,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:39,683 INFO L124 PetriNetUnfolderBase]: 4479/8093 cut-off events. [2024-06-27 16:27:39,683 INFO L125 PetriNetUnfolderBase]: For 157989/157991 co-relation queries the response was YES. [2024-06-27 16:27:39,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55065 conditions, 8093 events. 4479/8093 cut-off events. For 157989/157991 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 58425 event pairs, 1335 based on Foata normal form. 14/8107 useless extension candidates. Maximal degree in co-relation 54944. Up to 7327 conditions per place. [2024-06-27 16:27:39,743 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 434 selfloop transitions, 55 changer transitions 27/519 dead transitions. [2024-06-27 16:27:39,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 519 transitions, 10400 flow [2024-06-27 16:27:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:27:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:27:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 254 transitions. [2024-06-27 16:27:39,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-27 16:27:39,745 INFO L175 Difference]: Start difference. First operand has 285 places, 412 transitions, 8084 flow. Second operand 22 states and 254 transitions. [2024-06-27 16:27:39,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 519 transitions, 10400 flow [2024-06-27 16:27:40,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 519 transitions, 10091 flow, removed 1 selfloop flow, removed 19 redundant places. [2024-06-27 16:27:40,269 INFO L231 Difference]: Finished difference. Result has 297 places, 436 transitions, 8461 flow [2024-06-27 16:27:40,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8461, PETRI_PLACES=297, PETRI_TRANSITIONS=436} [2024-06-27 16:27:40,269 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 271 predicate places. [2024-06-27 16:27:40,269 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 436 transitions, 8461 flow [2024-06-27 16:27:40,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:40,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:40,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:40,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-06-27 16:27:40,476 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:40,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:40,477 INFO L85 PathProgramCache]: Analyzing trace with hash 406116903, now seen corresponding path program 10 times [2024-06-27 16:27:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:40,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9277693] [2024-06-27 16:27:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:40,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:40,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:40,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9277693] [2024-06-27 16:27:40,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9277693] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:40,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730761459] [2024-06-27 16:27:40,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:27:40,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:40,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:40,734 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:40,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 16:27:40,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:27:40,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:40,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 16:27:40,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:41,099 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-27 16:27:41,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-06-27 16:27:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:41,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:41,196 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:27:41,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:27:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:41,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730761459] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:41,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2024-06-27 16:27:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489162811] [2024-06-27 16:27:41,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:41,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:27:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:27:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:27:41,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:41,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 436 transitions, 8461 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:41,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:41,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:41,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:43,424 INFO L124 PetriNetUnfolderBase]: 4469/8101 cut-off events. [2024-06-27 16:27:43,424 INFO L125 PetriNetUnfolderBase]: For 173270/173272 co-relation queries the response was YES. [2024-06-27 16:27:43,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55933 conditions, 8101 events. 4469/8101 cut-off events. For 173270/173272 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58577 event pairs, 1299 based on Foata normal form. 14/8115 useless extension candidates. Maximal degree in co-relation 55802. Up to 6735 conditions per place. [2024-06-27 16:27:43,512 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 422 selfloop transitions, 58 changer transitions 32/515 dead transitions. [2024-06-27 16:27:43,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 515 transitions, 10464 flow [2024-06-27 16:27:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:27:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:27:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 196 transitions. [2024-06-27 16:27:43,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-06-27 16:27:43,513 INFO L175 Difference]: Start difference. First operand has 297 places, 436 transitions, 8461 flow. Second operand 17 states and 196 transitions. [2024-06-27 16:27:43,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 515 transitions, 10464 flow [2024-06-27 16:27:44,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 515 transitions, 10146 flow, removed 132 selfloop flow, removed 10 redundant places. [2024-06-27 16:27:44,142 INFO L231 Difference]: Finished difference. Result has 306 places, 435 transitions, 8359 flow [2024-06-27 16:27:44,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8359, PETRI_PLACES=306, PETRI_TRANSITIONS=435} [2024-06-27 16:27:44,143 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 280 predicate places. [2024-06-27 16:27:44,143 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 435 transitions, 8359 flow [2024-06-27 16:27:44,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:44,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:44,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:44,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:44,352 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:44,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -888786901, now seen corresponding path program 11 times [2024-06-27 16:27:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566503643] [2024-06-27 16:27:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566503643] [2024-06-27 16:27:44,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566503643] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570082511] [2024-06-27 16:27:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:27:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:44,737 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:44,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 16:27:44,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:27:44,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:44,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 16:27:44,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:44,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:44,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-06-27 16:27:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:45,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:45,090 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:27:45,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:27:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570082511] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:45,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:45,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 20 [2024-06-27 16:27:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716917623] [2024-06-27 16:27:45,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:45,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:27:45,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:27:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:27:45,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:45,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 435 transitions, 8359 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:45,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:45,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:45,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:47,467 INFO L124 PetriNetUnfolderBase]: 4494/8139 cut-off events. [2024-06-27 16:27:47,468 INFO L125 PetriNetUnfolderBase]: For 171961/171963 co-relation queries the response was YES. [2024-06-27 16:27:47,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55934 conditions, 8139 events. 4494/8139 cut-off events. For 171961/171963 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 58973 event pairs, 1217 based on Foata normal form. 30/8169 useless extension candidates. Maximal degree in co-relation 55799. Up to 6713 conditions per place. [2024-06-27 16:27:47,549 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 435 selfloop transitions, 85 changer transitions 4/527 dead transitions. [2024-06-27 16:27:47,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 527 transitions, 10644 flow [2024-06-27 16:27:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 16:27:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 16:27:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 212 transitions. [2024-06-27 16:27:47,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 16:27:47,551 INFO L175 Difference]: Start difference. First operand has 306 places, 435 transitions, 8359 flow. Second operand 18 states and 212 transitions. [2024-06-27 16:27:47,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 527 transitions, 10644 flow [2024-06-27 16:27:48,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 527 transitions, 10404 flow, removed 58 selfloop flow, removed 13 redundant places. [2024-06-27 16:27:48,375 INFO L231 Difference]: Finished difference. Result has 310 places, 453 transitions, 8812 flow [2024-06-27 16:27:48,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8185, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8812, PETRI_PLACES=310, PETRI_TRANSITIONS=453} [2024-06-27 16:27:48,376 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 284 predicate places. [2024-06-27 16:27:48,376 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 453 transitions, 8812 flow [2024-06-27 16:27:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:48,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:48,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:48,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:48,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:48,588 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:48,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1804670255, now seen corresponding path program 12 times [2024-06-27 16:27:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770800557] [2024-06-27 16:27:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770800557] [2024-06-27 16:27:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770800557] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291143576] [2024-06-27 16:27:48,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:27:48,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:48,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:48,823 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:48,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 16:27:48,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 16:27:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:48,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:27:48,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:49,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:49,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-06-27 16:27:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:49,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:49,154 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:27:49,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:27:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:27:49,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291143576] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:49,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-06-27 16:27:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080210887] [2024-06-27 16:27:49,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:27:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:27:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:27:49,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:49,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 453 transitions, 8812 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:49,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:49,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:49,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:51,634 INFO L124 PetriNetUnfolderBase]: 4775/8690 cut-off events. [2024-06-27 16:27:51,635 INFO L125 PetriNetUnfolderBase]: For 188859/188859 co-relation queries the response was YES. [2024-06-27 16:27:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59573 conditions, 8690 events. 4775/8690 cut-off events. For 188859/188859 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64236 event pairs, 1393 based on Foata normal form. 42/8732 useless extension candidates. Maximal degree in co-relation 59436. Up to 6938 conditions per place. [2024-06-27 16:27:51,715 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 451 selfloop transitions, 110 changer transitions 6/570 dead transitions. [2024-06-27 16:27:51,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 570 transitions, 11466 flow [2024-06-27 16:27:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:27:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:27:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 265 transitions. [2024-06-27 16:27:51,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301948051948052 [2024-06-27 16:27:51,716 INFO L175 Difference]: Start difference. First operand has 310 places, 453 transitions, 8812 flow. Second operand 22 states and 265 transitions. [2024-06-27 16:27:51,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 570 transitions, 11466 flow [2024-06-27 16:27:52,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 570 transitions, 11185 flow, removed 87 selfloop flow, removed 13 redundant places. [2024-06-27 16:27:52,502 INFO L231 Difference]: Finished difference. Result has 326 places, 488 transitions, 9772 flow [2024-06-27 16:27:52,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9772, PETRI_PLACES=326, PETRI_TRANSITIONS=488} [2024-06-27 16:27:52,502 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 300 predicate places. [2024-06-27 16:27:52,503 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 488 transitions, 9772 flow [2024-06-27 16:27:52,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:52,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:52,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:52,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-06-27 16:27:52,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-06-27 16:27:52,717 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:52,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1283208955, now seen corresponding path program 8 times [2024-06-27 16:27:52,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:52,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818275287] [2024-06-27 16:27:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:52,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:52,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818275287] [2024-06-27 16:27:52,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818275287] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944485692] [2024-06-27 16:27:52,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:27:52,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:52,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:52,959 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:52,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 16:27:53,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:27:53,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:53,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 16:27:53,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:53,285 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:27:53,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:27:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:53,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:53,358 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:27:53,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:27:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944485692] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:53,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 22 [2024-06-27 16:27:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716140019] [2024-06-27 16:27:53,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:53,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 16:27:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 16:27:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-27 16:27:53,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:53,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 488 transitions, 9772 flow. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:53,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:53,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:53,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:55,917 INFO L124 PetriNetUnfolderBase]: 5126/9323 cut-off events. [2024-06-27 16:27:55,917 INFO L125 PetriNetUnfolderBase]: For 220453/220455 co-relation queries the response was YES. [2024-06-27 16:27:55,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65525 conditions, 9323 events. 5126/9323 cut-off events. For 220453/220455 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 69661 event pairs, 1386 based on Foata normal form. 58/9381 useless extension candidates. Maximal degree in co-relation 65382. Up to 7057 conditions per place. [2024-06-27 16:27:56,009 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 491 selfloop transitions, 92 changer transitions 1/587 dead transitions. [2024-06-27 16:27:56,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 587 transitions, 12508 flow [2024-06-27 16:27:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 16:27:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 16:27:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 227 transitions. [2024-06-27 16:27:56,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266917293233083 [2024-06-27 16:27:56,010 INFO L175 Difference]: Start difference. First operand has 326 places, 488 transitions, 9772 flow. Second operand 19 states and 227 transitions. [2024-06-27 16:27:56,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 587 transitions, 12508 flow [2024-06-27 16:27:57,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 587 transitions, 12058 flow, removed 193 selfloop flow, removed 10 redundant places. [2024-06-27 16:27:57,071 INFO L231 Difference]: Finished difference. Result has 338 places, 502 transitions, 9921 flow [2024-06-27 16:27:57,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9380, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9921, PETRI_PLACES=338, PETRI_TRANSITIONS=502} [2024-06-27 16:27:57,072 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 312 predicate places. [2024-06-27 16:27:57,073 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 502 transitions, 9921 flow [2024-06-27 16:27:57,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:57,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:57,073 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:57,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:57,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 16:27:57,276 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:27:57,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash 134743177, now seen corresponding path program 13 times [2024-06-27 16:27:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103173954] [2024-06-27 16:27:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:57,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:57,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:57,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103173954] [2024-06-27 16:27:57,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103173954] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:57,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326990299] [2024-06-27 16:27:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:27:57,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:57,585 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:57,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 16:27:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:57,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:27:57,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:57,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:27:57,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-06-27 16:27:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:57,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:57,904 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-27 16:27:57,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-27 16:27:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 16:27:57,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326990299] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:57,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:57,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-06-27 16:27:57,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035430759] [2024-06-27 16:27:57,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:57,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 16:27:57,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 16:27:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-06-27 16:27:57,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:27:57,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 502 transitions, 9921 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:57,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:57,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:27:57,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:28:00,619 INFO L124 PetriNetUnfolderBase]: 5079/9229 cut-off events. [2024-06-27 16:28:00,619 INFO L125 PetriNetUnfolderBase]: For 191905/191907 co-relation queries the response was YES. [2024-06-27 16:28:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63719 conditions, 9229 events. 5079/9229 cut-off events. For 191905/191907 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 68814 event pairs, 1458 based on Foata normal form. 18/9247 useless extension candidates. Maximal degree in co-relation 63572. Up to 7814 conditions per place. [2024-06-27 16:28:00,716 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 470 selfloop transitions, 92 changer transitions 12/577 dead transitions. [2024-06-27 16:28:00,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 577 transitions, 11718 flow [2024-06-27 16:28:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:28:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:28:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 231 transitions. [2024-06-27 16:28:00,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 16:28:00,717 INFO L175 Difference]: Start difference. First operand has 338 places, 502 transitions, 9921 flow. Second operand 20 states and 231 transitions. [2024-06-27 16:28:00,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 577 transitions, 11718 flow [2024-06-27 16:28:01,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 577 transitions, 11505 flow, removed 44 selfloop flow, removed 13 redundant places. [2024-06-27 16:28:01,652 INFO L231 Difference]: Finished difference. Result has 346 places, 499 transitions, 9886 flow [2024-06-27 16:28:01,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9630, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9886, PETRI_PLACES=346, PETRI_TRANSITIONS=499} [2024-06-27 16:28:01,653 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 320 predicate places. [2024-06-27 16:28:01,653 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 499 transitions, 9886 flow [2024-06-27 16:28:01,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:01,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:28:01,654 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:28:01,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-27 16:28:01,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-27 16:28:01,865 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:28:01,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:28:01,866 INFO L85 PathProgramCache]: Analyzing trace with hash -556391305, now seen corresponding path program 14 times [2024-06-27 16:28:01,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:28:01,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241219034] [2024-06-27 16:28:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:28:01,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:28:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:28:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:28:02,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:28:02,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241219034] [2024-06-27 16:28:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241219034] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:28:02,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375896718] [2024-06-27 16:28:02,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:28:02,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:28:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:28:02,145 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:28:02,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 16:28:02,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:28:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:28:02,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 16:28:02,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:28:02,519 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 16:28:02,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-27 16:28:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 16:28:02,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:28:02,582 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 16:28:02,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 16:28:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 16:28:02,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375896718] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:28:02,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:28:02,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 21 [2024-06-27 16:28:02,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671030638] [2024-06-27 16:28:02,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:28:02,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:28:02,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:28:02,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:28:02,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:28:02,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:28:02,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 499 transitions, 9886 flow. Second operand has 22 states, 22 states have (on average 7.818181818181818) internal successors, (172), 22 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:02,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:28:02,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:28:02,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:28:05,285 INFO L124 PetriNetUnfolderBase]: 5029/9125 cut-off events. [2024-06-27 16:28:05,285 INFO L125 PetriNetUnfolderBase]: For 202831/202831 co-relation queries the response was YES. [2024-06-27 16:28:05,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63325 conditions, 9125 events. 5029/9125 cut-off events. For 202831/202831 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 67382 event pairs, 1324 based on Foata normal form. 42/9167 useless extension candidates. Maximal degree in co-relation 63176. Up to 7091 conditions per place. [2024-06-27 16:28:05,378 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 468 selfloop transitions, 120 changer transitions 1/592 dead transitions. [2024-06-27 16:28:05,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 592 transitions, 12203 flow [2024-06-27 16:28:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 16:28:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 16:28:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 249 transitions. [2024-06-27 16:28:05,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446428571428571 [2024-06-27 16:28:05,380 INFO L175 Difference]: Start difference. First operand has 346 places, 499 transitions, 9886 flow. Second operand 20 states and 249 transitions. [2024-06-27 16:28:05,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 592 transitions, 12203 flow [2024-06-27 16:28:06,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 592 transitions, 11910 flow, removed 60 selfloop flow, removed 19 redundant places. [2024-06-27 16:28:06,381 INFO L231 Difference]: Finished difference. Result has 346 places, 502 transitions, 9974 flow [2024-06-27 16:28:06,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9631, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9974, PETRI_PLACES=346, PETRI_TRANSITIONS=502} [2024-06-27 16:28:06,383 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 320 predicate places. [2024-06-27 16:28:06,383 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 502 transitions, 9974 flow [2024-06-27 16:28:06,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.818181818181818) internal successors, (172), 22 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:06,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:28:06,383 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:28:06,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-27 16:28:06,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:28:06,594 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:28:06,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:28:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1228389331, now seen corresponding path program 9 times [2024-06-27 16:28:06,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:28:06,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396312339] [2024-06-27 16:28:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:28:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:28:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:28:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:28:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:28:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396312339] [2024-06-27 16:28:06,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396312339] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:28:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62465215] [2024-06-27 16:28:06,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:28:06,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:28:06,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:28:06,837 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:28:06,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 16:28:06,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:28:06,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:28:06,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 49 conjunts are in the unsatisfiable core [2024-06-27 16:28:06,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:28:07,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:28:07,230 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2024-06-27 16:28:07,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 45 [2024-06-27 16:28:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:28:07,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:28:07,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:28:07,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2024-06-27 16:28:07,867 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 16:28:07,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2024-06-27 16:28:07,941 INFO L349 Elim1Store]: treesize reduction 15, result has 78.9 percent of original size [2024-06-27 16:28:07,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 185 [2024-06-27 16:28:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:28:08,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62465215] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:28:08,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:28:08,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2024-06-27 16:28:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276141188] [2024-06-27 16:28:08,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:28:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:28:08,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:28:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:28:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:28:08,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:28:08,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 502 transitions, 9974 flow. Second operand has 36 states, 36 states have (on average 6.972222222222222) internal successors, (251), 36 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:08,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:28:08,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:28:08,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:28:16,369 INFO L124 PetriNetUnfolderBase]: 13183/24218 cut-off events. [2024-06-27 16:28:16,369 INFO L125 PetriNetUnfolderBase]: For 558201/558203 co-relation queries the response was YES. [2024-06-27 16:28:16,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168200 conditions, 24218 events. 13183/24218 cut-off events. For 558201/558203 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 211201 event pairs, 1501 based on Foata normal form. 21/24239 useless extension candidates. Maximal degree in co-relation 167098. Up to 7390 conditions per place. [2024-06-27 16:28:16,724 INFO L140 encePairwiseOnDemand]: 13/28 looper letters, 680 selfloop transitions, 1036 changer transitions 23/1742 dead transitions. [2024-06-27 16:28:16,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1742 transitions, 35000 flow [2024-06-27 16:28:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 16:28:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 16:28:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 764 transitions. [2024-06-27 16:28:16,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012605042016807 [2024-06-27 16:28:16,740 INFO L175 Difference]: Start difference. First operand has 346 places, 502 transitions, 9974 flow. Second operand 68 states and 764 transitions. [2024-06-27 16:28:16,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1742 transitions, 35000 flow [2024-06-27 16:28:20,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1742 transitions, 33007 flow, removed 273 selfloop flow, removed 21 redundant places. [2024-06-27 16:28:20,355 INFO L231 Difference]: Finished difference. Result has 416 places, 1362 transitions, 29978 flow [2024-06-27 16:28:20,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9324, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=29978, PETRI_PLACES=416, PETRI_TRANSITIONS=1362} [2024-06-27 16:28:20,356 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 390 predicate places. [2024-06-27 16:28:20,356 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1362 transitions, 29978 flow [2024-06-27 16:28:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.972222222222222) internal successors, (251), 36 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:20,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:28:20,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:28:20,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 16:28:20,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-06-27 16:28:20,568 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 16:28:20,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:28:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1664639875, now seen corresponding path program 15 times [2024-06-27 16:28:20,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:28:20,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868350194] [2024-06-27 16:28:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:28:20,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:28:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:28:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:28:20,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:28:20,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868350194] [2024-06-27 16:28:20,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868350194] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:28:20,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484111181] [2024-06-27 16:28:20,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:28:20,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:28:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:28:20,809 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:28:20,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 16:28:20,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 16:28:20,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:28:20,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 55 conjunts are in the unsatisfiable core [2024-06-27 16:28:20,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:28:20,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-27 16:28:20,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:28:21,014 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 16:28:21,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-27 16:28:21,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 16:28:21,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:28:21,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-06-27 16:28:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:28:21,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:28:21,445 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-06-27 16:28:21,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-06-27 16:28:21,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:28:21,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 73 [2024-06-27 16:28:21,697 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:28:21,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 101 [2024-06-27 16:28:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-27 16:28:21,757 INFO L349 Elim1Store]: treesize reduction 8, result has 91.4 percent of original size [2024-06-27 16:28:21,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 98 treesize of output 133 [2024-06-27 16:28:21,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:28:21,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2024-06-27 16:28:21,949 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:28:21,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 64 [2024-06-27 16:28:21,952 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-27 16:28:21,982 INFO L349 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2024-06-27 16:28:21,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 72 [2024-06-27 16:28:22,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:28:22,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2024-06-27 16:28:22,029 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:28:22,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 90 [2024-06-27 16:28:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-27 16:28:22,061 INFO L349 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2024-06-27 16:28:22,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 87 [2024-06-27 16:28:22,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:28:22,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-06-27 16:28:22,158 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 16:28:22,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 75 [2024-06-27 16:28:22,163 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-27 16:28:22,193 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2024-06-27 16:28:22,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 78 [2024-06-27 16:28:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:28:22,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484111181] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:28:22,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:28:22,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2024-06-27 16:28:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707720395] [2024-06-27 16:28:22,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:28:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:28:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:28:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:28:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=776, Unknown=6, NotChecked=0, Total=992 [2024-06-27 16:28:22,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-06-27 16:28:22,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1362 transitions, 29978 flow. Second operand has 32 states, 32 states have (on average 6.84375) internal successors, (219), 32 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:22,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:28:22,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-06-27 16:28:22,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand