./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/test-easy11.wvr.yml/witness.yml --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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/test-easy11.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:04:37,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:04:37,620 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:04:37,625 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:04:37,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:04:37,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:04:37,651 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:04:37,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:04:37,652 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:04:37,656 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:04:37,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:04:37,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:04:37,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:04:37,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:04:37,659 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:04:37,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:04:37,659 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:04:37,660 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:04:37,660 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:04:37,660 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:04:37,660 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:04:37,661 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:04:37,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:04:37,661 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:04:37,661 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:04:37,661 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:04:37,662 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:04:37,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:04:37,663 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:04:37,663 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:04:37,664 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:04:37,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:04:37,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:04:37,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:04:37,664 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:04:37,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:04:37,665 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:04:37,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:04:37,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:04:37,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:04:37,666 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:04:37,666 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:04:37,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:04:37,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:04:38,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:04:38,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:04:38,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:04:38,107 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:04:38,108 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:04:38,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/test-easy11.wvr.yml/witness.yml [2024-06-27 18:04:38,160 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:04:38,161 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:04:38,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-06-27 18:04:39,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:04:39,446 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:04:39,447 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-06-27 18:04:39,452 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c840ec275/63e2638663fa49d08854ad4474eec4aa/FLAG4929b7128 [2024-06-27 18:04:39,463 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c840ec275/63e2638663fa49d08854ad4474eec4aa [2024-06-27 18:04:39,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:04:39,464 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:04:39,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:04:39,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:04:39,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:04:39,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:04:38" (1/2) ... [2024-06-27 18:04:39,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bab9e6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:04:39, skipping insertion in model container [2024-06-27 18:04:39,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:04:38" (1/2) ... [2024-06-27 18:04:39,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a752c69 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:04:39, skipping insertion in model container [2024-06-27 18:04:39,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:04:39" (2/2) ... [2024-06-27 18:04:39,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bab9e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39, skipping insertion in model container [2024-06-27 18:04:39,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:04:39" (2/2) ... [2024-06-27 18:04:39,475 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:04:39,487 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:04:39,487 INFO L97 edCorrectnessWitness]: Location invariant before [L74-L74] ! multithreaded || 0 <= Y [2024-06-27 18:04:39,487 INFO L97 edCorrectnessWitness]: Location invariant before [L75-L75] ! multithreaded || 0 <= Y [2024-06-27 18:04:39,488 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:04:39,488 INFO L106 edCorrectnessWitness]: ghost_update [L73-L73] multithreaded = 1; [2024-06-27 18:04:39,501 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:04:39,640 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/test-easy11.wvr.c[2031,2044] [2024-06-27 18:04:39,647 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:04:39,659 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:04:39,702 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/test-easy11.wvr.c[2031,2044] [2024-06-27 18:04:39,703 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:04:39,714 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:04:39,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39 WrapperNode [2024-06-27 18:04:39,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:04:39,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:04:39,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:04:39,724 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:04:39,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,746 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-06-27 18:04:39,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:04:39,747 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:04:39,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:04:39,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:04:39,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,764 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 18:04:39,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:04:39,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:04:39,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:04:39,773 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:04:39,773 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (1/1) ... [2024-06-27 18:04:39,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:04:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:39,794 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 18:04:39,811 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 18:04:39,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:04:39,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:04:39,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:04:39,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:04:39,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:04:39,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:04:39,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:04:39,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:04:39,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:04:39,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:04:39,842 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 18:04:39,932 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:04:39,934 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:04:40,064 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:04:40,064 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:04:40,139 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:04:40,139 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 18:04:40,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:04:40 BoogieIcfgContainer [2024-06-27 18:04:40,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:04:40,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:04:40,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:04:40,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:04:40,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:04:38" (1/4) ... [2024-06-27 18:04:40,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5f85f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:04:40, skipping insertion in model container [2024-06-27 18:04:40,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:04:39" (2/4) ... [2024-06-27 18:04:40,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5f85f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:04:40, skipping insertion in model container [2024-06-27 18:04:40,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:39" (3/4) ... [2024-06-27 18:04:40,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5f85f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:04:40, skipping insertion in model container [2024-06-27 18:04:40,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:04:40" (4/4) ... [2024-06-27 18:04:40,147 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2024-06-27 18:04:40,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:04:40,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:04:40,161 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:04:40,192 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:04:40,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 27 transitions, 68 flow [2024-06-27 18:04:40,234 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-06-27 18:04:40,235 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:04:40,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 2/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-06-27 18:04:40,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 27 transitions, 68 flow [2024-06-27 18:04:40,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 60 flow [2024-06-27 18:04:40,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:04:40,253 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=false, 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;@35d98dbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:04:40,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:04:40,263 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:04:40,263 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-06-27 18:04:40,263 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:04:40,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:40,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:04:40,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:40,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 206118425, now seen corresponding path program 1 times [2024-06-27 18:04:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:40,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582417959] [2024-06-27 18:04:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:40,437 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 18:04:40,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582417959] [2024-06-27 18:04:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582417959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:40,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:04:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83984499] [2024-06-27 18:04:40,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:40,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:04:40,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:04:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:04:40,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:40,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:04:40,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:40,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:40,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:40,598 INFO L124 PetriNetUnfolderBase]: 123/222 cut-off events. [2024-06-27 18:04:40,599 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-27 18:04:40,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 222 events. 123/222 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 658 event pairs, 41 based on Foata normal form. 9/201 useless extension candidates. Maximal degree in co-relation 416. Up to 150 conditions per place. [2024-06-27 18:04:40,604 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 30 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-06-27 18:04:40,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 36 transitions, 153 flow [2024-06-27 18:04:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:04:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:04:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-06-27 18:04:40,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-27 18:04:40,618 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 3 states and 50 transitions. [2024-06-27 18:04:40,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 36 transitions, 153 flow [2024-06-27 18:04:40,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 143 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:40,623 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 73 flow [2024-06-27 18:04:40,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2024-06-27 18:04:40,630 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2024-06-27 18:04:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 73 flow [2024-06-27 18:04:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 18:04:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:40,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:04:40,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:40,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1328356264, now seen corresponding path program 1 times [2024-06-27 18:04:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:40,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794869050] [2024-06-27 18:04:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:40,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:40,720 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 18:04:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794869050] [2024-06-27 18:04:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794869050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:40,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:40,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:04:40,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884255199] [2024-06-27 18:04:40,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:40,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:40,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 73 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:40,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:40,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:40,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:40,877 INFO L124 PetriNetUnfolderBase]: 111/200 cut-off events. [2024-06-27 18:04:40,878 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-27 18:04:40,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 200 events. 111/200 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 561 event pairs, 17 based on Foata normal form. 8/182 useless extension candidates. Maximal degree in co-relation 137. Up to 82 conditions per place. [2024-06-27 18:04:40,881 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 37 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2024-06-27 18:04:40,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 203 flow [2024-06-27 18:04:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-06-27 18:04:40,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 18:04:40,884 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 73 flow. Second operand 5 states and 70 transitions. [2024-06-27 18:04:40,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 203 flow [2024-06-27 18:04:40,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:40,892 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 93 flow [2024-06-27 18:04:40,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-06-27 18:04:40,893 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-06-27 18:04:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 93 flow [2024-06-27 18:04:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:40,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:40,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:04:40,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:40,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:40,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1317764019, now seen corresponding path program 1 times [2024-06-27 18:04:40,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:40,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494739086] [2024-06-27 18:04:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:41,078 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 18:04:41,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:41,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494739086] [2024-06-27 18:04:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494739086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:41,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:41,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:04:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051251726] [2024-06-27 18:04:41,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:41,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:41,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:41,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 18:04:41,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:41,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:41,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:41,165 INFO L124 PetriNetUnfolderBase]: 100/185 cut-off events. [2024-06-27 18:04:41,166 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-06-27 18:04:41,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 185 events. 100/185 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 502 event pairs, 28 based on Foata normal form. 6/180 useless extension candidates. Maximal degree in co-relation 253. Up to 83 conditions per place. [2024-06-27 18:04:41,168 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 33 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-06-27 18:04:41,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 214 flow [2024-06-27 18:04:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-27 18:04:41,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 18:04:41,169 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 93 flow. Second operand 5 states and 65 transitions. [2024-06-27 18:04:41,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 214 flow [2024-06-27 18:04:41,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 203 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 18:04:41,171 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 115 flow [2024-06-27 18:04:41,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-06-27 18:04:41,172 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-06-27 18:04:41,172 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 115 flow [2024-06-27 18:04:41,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 18:04:41,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:41,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:41,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:04:41,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:41,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1705635350, now seen corresponding path program 1 times [2024-06-27 18:04:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:41,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397531312] [2024-06-27 18:04:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:41,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:41,252 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 18:04:41,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397531312] [2024-06-27 18:04:41,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397531312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:41,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:41,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028971871] [2024-06-27 18:04:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:41,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:41,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:41,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:41,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:41,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:41,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:41,386 INFO L124 PetriNetUnfolderBase]: 110/211 cut-off events. [2024-06-27 18:04:41,387 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-06-27 18:04:41,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554 conditions, 211 events. 110/211 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 639 event pairs, 14 based on Foata normal form. 4/215 useless extension candidates. Maximal degree in co-relation 418. Up to 65 conditions per place. [2024-06-27 18:04:41,389 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 45 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-06-27 18:04:41,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 290 flow [2024-06-27 18:04:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-27 18:04:41,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 18:04:41,391 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 115 flow. Second operand 7 states and 89 transitions. [2024-06-27 18:04:41,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 290 flow [2024-06-27 18:04:41,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 284 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:41,393 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 134 flow [2024-06-27 18:04:41,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2024-06-27 18:04:41,394 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-06-27 18:04:41,394 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 134 flow [2024-06-27 18:04:41,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:41,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:41,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:04:41,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:41,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:41,395 INFO L85 PathProgramCache]: Analyzing trace with hash -210541906, now seen corresponding path program 2 times [2024-06-27 18:04:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:41,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130857248] [2024-06-27 18:04:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:41,465 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 18:04:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130857248] [2024-06-27 18:04:41,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130857248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:41,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948334602] [2024-06-27 18:04:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:41,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:41,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:41,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:41,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:41,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:41,577 INFO L124 PetriNetUnfolderBase]: 123/246 cut-off events. [2024-06-27 18:04:41,578 INFO L125 PetriNetUnfolderBase]: For 217/217 co-relation queries the response was YES. [2024-06-27 18:04:41,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 246 events. 123/246 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 814 event pairs, 26 based on Foata normal form. 4/250 useless extension candidates. Maximal degree in co-relation 575. Up to 110 conditions per place. [2024-06-27 18:04:41,579 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 42 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-06-27 18:04:41,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 319 flow [2024-06-27 18:04:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 18:04:41,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 18:04:41,581 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 134 flow. Second operand 7 states and 87 transitions. [2024-06-27 18:04:41,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 319 flow [2024-06-27 18:04:41,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 291 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:41,583 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 177 flow [2024-06-27 18:04:41,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=177, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-06-27 18:04:41,584 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-27 18:04:41,584 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 177 flow [2024-06-27 18:04:41,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:41,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:41,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:04:41,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:41,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1705515380, now seen corresponding path program 3 times [2024-06-27 18:04:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782226555] [2024-06-27 18:04:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:41,640 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 18:04:41,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:41,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782226555] [2024-06-27 18:04:41,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782226555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:41,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:41,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646089136] [2024-06-27 18:04:41,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:41,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:41,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:41,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 177 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:41,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:41,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:41,753 INFO L124 PetriNetUnfolderBase]: 132/270 cut-off events. [2024-06-27 18:04:41,753 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-06-27 18:04:41,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 270 events. 132/270 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 966 event pairs, 19 based on Foata normal form. 4/274 useless extension candidates. Maximal degree in co-relation 647. Up to 109 conditions per place. [2024-06-27 18:04:41,755 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 44 selfloop transitions, 14 changer transitions 0/61 dead transitions. [2024-06-27 18:04:41,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 362 flow [2024-06-27 18:04:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-27 18:04:41,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 18:04:41,756 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 177 flow. Second operand 7 states and 90 transitions. [2024-06-27 18:04:41,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 362 flow [2024-06-27 18:04:41,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 346 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:41,759 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 224 flow [2024-06-27 18:04:41,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2024-06-27 18:04:41,759 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2024-06-27 18:04:41,760 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 224 flow [2024-06-27 18:04:41,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:41,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:41,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:04:41,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:41,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -215010556, now seen corresponding path program 4 times [2024-06-27 18:04:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:41,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948513059] [2024-06-27 18:04:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:41,807 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 18:04:41,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:41,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948513059] [2024-06-27 18:04:41,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948513059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:41,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:41,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902479712] [2024-06-27 18:04:41,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:41,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:41,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:41,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:41,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:41,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:41,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:41,963 INFO L124 PetriNetUnfolderBase]: 137/288 cut-off events. [2024-06-27 18:04:41,963 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2024-06-27 18:04:41,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 288 events. 137/288 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1087 event pairs, 43 based on Foata normal form. 4/292 useless extension candidates. Maximal degree in co-relation 744. Up to 184 conditions per place. [2024-06-27 18:04:41,965 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 46 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-27 18:04:41,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 391 flow [2024-06-27 18:04:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-27 18:04:41,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 18:04:41,967 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 224 flow. Second operand 7 states and 89 transitions. [2024-06-27 18:04:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 391 flow [2024-06-27 18:04:41,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:41,970 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 232 flow [2024-06-27 18:04:41,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2024-06-27 18:04:41,971 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2024-06-27 18:04:41,971 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 232 flow [2024-06-27 18:04:41,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:41,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:41,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:41,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:04:41,972 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:41,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash -210364276, now seen corresponding path program 5 times [2024-06-27 18:04:41,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:41,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520800148] [2024-06-27 18:04:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:41,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:42,017 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 18:04:42,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:42,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520800148] [2024-06-27 18:04:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520800148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:42,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599064131] [2024-06-27 18:04:42,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:42,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:42,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:42,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:42,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:42,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:42,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:42,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:42,128 INFO L124 PetriNetUnfolderBase]: 146/316 cut-off events. [2024-06-27 18:04:42,128 INFO L125 PetriNetUnfolderBase]: For 568/568 co-relation queries the response was YES. [2024-06-27 18:04:42,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 316 events. 146/316 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1275 event pairs, 38 based on Foata normal form. 4/320 useless extension candidates. Maximal degree in co-relation 814. Up to 177 conditions per place. [2024-06-27 18:04:42,130 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 42 selfloop transitions, 13 changer transitions 0/58 dead transitions. [2024-06-27 18:04:42,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 395 flow [2024-06-27 18:04:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-27 18:04:42,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 18:04:42,132 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 232 flow. Second operand 7 states and 84 transitions. [2024-06-27 18:04:42,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 395 flow [2024-06-27 18:04:42,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 366 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:42,135 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 240 flow [2024-06-27 18:04:42,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2024-06-27 18:04:42,136 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2024-06-27 18:04:42,136 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 240 flow [2024-06-27 18:04:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:42,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:42,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:42,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:04:42,137 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:42,138 INFO L85 PathProgramCache]: Analyzing trace with hash -210537256, now seen corresponding path program 6 times [2024-06-27 18:04:42,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:42,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568824780] [2024-06-27 18:04:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:42,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:42,188 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 18:04:42,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568824780] [2024-06-27 18:04:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568824780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:42,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:42,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:42,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555148643] [2024-06-27 18:04:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:42,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:42,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:42,319 INFO L124 PetriNetUnfolderBase]: 142/308 cut-off events. [2024-06-27 18:04:42,319 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2024-06-27 18:04:42,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 308 events. 142/308 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1231 event pairs, 48 based on Foata normal form. 4/312 useless extension candidates. Maximal degree in co-relation 809. Up to 203 conditions per place. [2024-06-27 18:04:42,321 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 42 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-06-27 18:04:42,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 371 flow [2024-06-27 18:04:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-27 18:04:42,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 18:04:42,323 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 240 flow. Second operand 7 states and 84 transitions. [2024-06-27 18:04:42,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 371 flow [2024-06-27 18:04:42,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 316 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-27 18:04:42,325 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 189 flow [2024-06-27 18:04:42,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=189, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2024-06-27 18:04:42,325 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2024-06-27 18:04:42,325 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 189 flow [2024-06-27 18:04:42,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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 18:04:42,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:42,326 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 18:04:42,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:04:42,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:42,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:42,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1724968125, now seen corresponding path program 1 times [2024-06-27 18:04:42,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:42,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180885793] [2024-06-27 18:04:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:42,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:42,450 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 18:04:42,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180885793] [2024-06-27 18:04:42,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180885793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:42,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:42,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183205633] [2024-06-27 18:04:42,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:42,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:42,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:42,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:42,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:42,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:42,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:42,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:42,695 INFO L124 PetriNetUnfolderBase]: 175/367 cut-off events. [2024-06-27 18:04:42,695 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-27 18:04:42,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 367 events. 175/367 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1572 event pairs, 40 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 347. Up to 242 conditions per place. [2024-06-27 18:04:42,697 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 48 selfloop transitions, 18 changer transitions 10/79 dead transitions. [2024-06-27 18:04:42,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 493 flow [2024-06-27 18:04:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-27 18:04:42,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-06-27 18:04:42,699 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 189 flow. Second operand 9 states and 113 transitions. [2024-06-27 18:04:42,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 493 flow [2024-06-27 18:04:42,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 447 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:42,701 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 277 flow [2024-06-27 18:04:42,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=277, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-06-27 18:04:42,702 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-27 18:04:42,702 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 277 flow [2024-06-27 18:04:42,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:42,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:42,703 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 18:04:42,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:04:42,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:42,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:42,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1410059093, now seen corresponding path program 2 times [2024-06-27 18:04:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:42,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870149542] [2024-06-27 18:04:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:42,802 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 18:04:42,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:42,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870149542] [2024-06-27 18:04:42,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870149542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:42,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:42,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919007307] [2024-06-27 18:04:42,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:42,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:42,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:42,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:42,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 277 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:42,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:42,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:42,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:43,014 INFO L124 PetriNetUnfolderBase]: 213/431 cut-off events. [2024-06-27 18:04:43,014 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2024-06-27 18:04:43,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1342 conditions, 431 events. 213/431 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1861 event pairs, 49 based on Foata normal form. 1/432 useless extension candidates. Maximal degree in co-relation 1307. Up to 277 conditions per place. [2024-06-27 18:04:43,017 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 46 selfloop transitions, 29 changer transitions 10/88 dead transitions. [2024-06-27 18:04:43,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 673 flow [2024-06-27 18:04:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-27 18:04:43,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 18:04:43,019 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 277 flow. Second operand 9 states and 108 transitions. [2024-06-27 18:04:43,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 673 flow [2024-06-27 18:04:43,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 640 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:43,023 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 504 flow [2024-06-27 18:04:43,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=504, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-27 18:04:43,024 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2024-06-27 18:04:43,024 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 504 flow [2024-06-27 18:04:43,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:43,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:43,025 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 18:04:43,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:04:43,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:43,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 68773997, now seen corresponding path program 3 times [2024-06-27 18:04:43,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:43,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929200108] [2024-06-27 18:04:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:43,130 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 18:04:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:43,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929200108] [2024-06-27 18:04:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929200108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:43,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916220191] [2024-06-27 18:04:43,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:43,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:43,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:43,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:43,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:43,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:43,365 INFO L124 PetriNetUnfolderBase]: 218/440 cut-off events. [2024-06-27 18:04:43,365 INFO L125 PetriNetUnfolderBase]: For 642/642 co-relation queries the response was YES. [2024-06-27 18:04:43,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 440 events. 218/440 cut-off events. For 642/642 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1924 event pairs, 22 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 1497. Up to 193 conditions per place. [2024-06-27 18:04:43,368 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 52 selfloop transitions, 32 changer transitions 10/97 dead transitions. [2024-06-27 18:04:43,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 97 transitions, 810 flow [2024-06-27 18:04:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-27 18:04:43,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45267489711934156 [2024-06-27 18:04:43,369 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 504 flow. Second operand 9 states and 110 transitions. [2024-06-27 18:04:43,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 97 transitions, 810 flow [2024-06-27 18:04:43,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 778 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 18:04:43,373 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 558 flow [2024-06-27 18:04:43,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=558, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-06-27 18:04:43,374 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-06-27 18:04:43,374 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 558 flow [2024-06-27 18:04:43,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:43,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:43,374 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 18:04:43,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:04:43,375 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:43,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash -106618475, now seen corresponding path program 4 times [2024-06-27 18:04:43,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:43,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003132726] [2024-06-27 18:04:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:43,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:43,456 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 18:04:43,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:43,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003132726] [2024-06-27 18:04:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003132726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:43,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:43,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658560456] [2024-06-27 18:04:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:43,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:43,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:43,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:43,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:43,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:43,699 INFO L124 PetriNetUnfolderBase]: 256/503 cut-off events. [2024-06-27 18:04:43,700 INFO L125 PetriNetUnfolderBase]: For 1023/1023 co-relation queries the response was YES. [2024-06-27 18:04:43,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 503 events. 256/503 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2270 event pairs, 43 based on Foata normal form. 1/504 useless extension candidates. Maximal degree in co-relation 1879. Up to 329 conditions per place. [2024-06-27 18:04:43,703 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 58 selfloop transitions, 37 changer transitions 10/108 dead transitions. [2024-06-27 18:04:43,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 1040 flow [2024-06-27 18:04:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-27 18:04:43,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2024-06-27 18:04:43,705 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 558 flow. Second operand 9 states and 112 transitions. [2024-06-27 18:04:43,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 1040 flow [2024-06-27 18:04:43,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 962 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:43,709 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 792 flow [2024-06-27 18:04:43,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=792, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-27 18:04:43,710 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2024-06-27 18:04:43,710 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 792 flow [2024-06-27 18:04:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:43,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:43,711 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 18:04:43,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:04:43,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:43,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash -591207947, now seen corresponding path program 5 times [2024-06-27 18:04:43,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:43,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323397160] [2024-06-27 18:04:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:43,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:43,799 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 18:04:43,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323397160] [2024-06-27 18:04:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323397160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:43,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:43,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872465170] [2024-06-27 18:04:43,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:43,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:43,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:43,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 792 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:43,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:43,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:43,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,028 INFO L124 PetriNetUnfolderBase]: 246/488 cut-off events. [2024-06-27 18:04:44,028 INFO L125 PetriNetUnfolderBase]: For 1254/1254 co-relation queries the response was YES. [2024-06-27 18:04:44,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 488 events. 246/488 cut-off events. For 1254/1254 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2184 event pairs, 48 based on Foata normal form. 1/489 useless extension candidates. Maximal degree in co-relation 1927. Up to 338 conditions per place. [2024-06-27 18:04:44,032 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 59 selfloop transitions, 34 changer transitions 10/106 dead transitions. [2024-06-27 18:04:44,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 1089 flow [2024-06-27 18:04:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-27 18:04:44,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448559670781893 [2024-06-27 18:04:44,033 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 792 flow. Second operand 9 states and 109 transitions. [2024-06-27 18:04:44,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 1089 flow [2024-06-27 18:04:44,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 1033 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:44,040 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 793 flow [2024-06-27 18:04:44,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=793, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-06-27 18:04:44,040 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-27 18:04:44,041 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 793 flow [2024-06-27 18:04:44,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,041 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 18:04:44,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:04:44,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash 819810009, now seen corresponding path program 6 times [2024-06-27 18:04:44,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78368925] [2024-06-27 18:04:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,135 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 18:04:44,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78368925] [2024-06-27 18:04:44,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78368925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825996517] [2024-06-27 18:04:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:44,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:44,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:44,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,329 INFO L124 PetriNetUnfolderBase]: 243/484 cut-off events. [2024-06-27 18:04:44,329 INFO L125 PetriNetUnfolderBase]: For 1187/1187 co-relation queries the response was YES. [2024-06-27 18:04:44,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1921 conditions, 484 events. 243/484 cut-off events. For 1187/1187 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2176 event pairs, 46 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 1877. Up to 336 conditions per place. [2024-06-27 18:04:44,333 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 58 selfloop transitions, 32 changer transitions 11/104 dead transitions. [2024-06-27 18:04:44,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 104 transitions, 1081 flow [2024-06-27 18:04:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 18:04:44,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-06-27 18:04:44,334 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 793 flow. Second operand 9 states and 107 transitions. [2024-06-27 18:04:44,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 104 transitions, 1081 flow [2024-06-27 18:04:44,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 1001 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:44,339 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 759 flow [2024-06-27 18:04:44,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=759, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-06-27 18:04:44,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-27 18:04:44,340 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 759 flow [2024-06-27 18:04:44,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,340 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 18:04:44,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:04:44,341 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,341 INFO L85 PathProgramCache]: Analyzing trace with hash 589384319, now seen corresponding path program 7 times [2024-06-27 18:04:44,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771215491] [2024-06-27 18:04:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,418 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 18:04:44,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771215491] [2024-06-27 18:04:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771215491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:44,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741461810] [2024-06-27 18:04:44,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:44,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:44,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:44,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 759 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:44,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,623 INFO L124 PetriNetUnfolderBase]: 256/507 cut-off events. [2024-06-27 18:04:44,624 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2024-06-27 18:04:44,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1950 conditions, 507 events. 256/507 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2295 event pairs, 42 based on Foata normal form. 1/508 useless extension candidates. Maximal degree in co-relation 1905. Up to 342 conditions per place. [2024-06-27 18:04:44,628 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 58 selfloop transitions, 36 changer transitions 9/106 dead transitions. [2024-06-27 18:04:44,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 1080 flow [2024-06-27 18:04:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-27 18:04:44,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448559670781893 [2024-06-27 18:04:44,630 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 759 flow. Second operand 9 states and 109 transitions. [2024-06-27 18:04:44,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 1080 flow [2024-06-27 18:04:44,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 106 transitions, 1010 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:44,635 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 836 flow [2024-06-27 18:04:44,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=836, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2024-06-27 18:04:44,636 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-27 18:04:44,636 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 836 flow [2024-06-27 18:04:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,637 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 18:04:44,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:04:44,637 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2054412287, now seen corresponding path program 8 times [2024-06-27 18:04:44,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416461163] [2024-06-27 18:04:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,730 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 18:04:44,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416461163] [2024-06-27 18:04:44,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416461163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519652962] [2024-06-27 18:04:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:44,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:44,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 836 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:44,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,932 INFO L124 PetriNetUnfolderBase]: 248/495 cut-off events. [2024-06-27 18:04:44,933 INFO L125 PetriNetUnfolderBase]: For 1315/1315 co-relation queries the response was YES. [2024-06-27 18:04:44,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1988 conditions, 495 events. 248/495 cut-off events. For 1315/1315 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2264 event pairs, 46 based on Foata normal form. 1/496 useless extension candidates. Maximal degree in co-relation 1941. Up to 350 conditions per place. [2024-06-27 18:04:44,936 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 58 selfloop transitions, 33 changer transitions 9/103 dead transitions. [2024-06-27 18:04:44,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 1101 flow [2024-06-27 18:04:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 18:04:44,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-06-27 18:04:44,938 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 836 flow. Second operand 9 states and 107 transitions. [2024-06-27 18:04:44,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 1101 flow [2024-06-27 18:04:44,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 1039 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:44,943 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 816 flow [2024-06-27 18:04:44,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=816, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-06-27 18:04:44,944 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-27 18:04:44,944 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 816 flow [2024-06-27 18:04:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:44,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,944 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 18:04:44,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:04:44,945 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,945 INFO L85 PathProgramCache]: Analyzing trace with hash 778841727, now seen corresponding path program 9 times [2024-06-27 18:04:44,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292231447] [2024-06-27 18:04:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,022 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 18:04:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292231447] [2024-06-27 18:04:45,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292231447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114654263] [2024-06-27 18:04:45,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:45,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:45,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 816 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:45,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,222 INFO L124 PetriNetUnfolderBase]: 242/485 cut-off events. [2024-06-27 18:04:45,223 INFO L125 PetriNetUnfolderBase]: For 1273/1273 co-relation queries the response was YES. [2024-06-27 18:04:45,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1923 conditions, 485 events. 242/485 cut-off events. For 1273/1273 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2196 event pairs, 46 based on Foata normal form. 1/486 useless extension candidates. Maximal degree in co-relation 1877. Up to 338 conditions per place. [2024-06-27 18:04:45,226 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 56 selfloop transitions, 31 changer transitions 12/102 dead transitions. [2024-06-27 18:04:45,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 1082 flow [2024-06-27 18:04:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 18:04:45,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-06-27 18:04:45,228 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 816 flow. Second operand 9 states and 107 transitions. [2024-06-27 18:04:45,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 1082 flow [2024-06-27 18:04:45,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 1014 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:45,232 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 768 flow [2024-06-27 18:04:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=768, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2024-06-27 18:04:45,233 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-27 18:04:45,233 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 768 flow [2024-06-27 18:04:45,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:45,234 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 18:04:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:04:45,234 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1992022349, now seen corresponding path program 10 times [2024-06-27 18:04:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:45,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251911038] [2024-06-27 18:04:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,313 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 18:04:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251911038] [2024-06-27 18:04:45,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251911038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106853714] [2024-06-27 18:04:45,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:45,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:45,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 768 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:45,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,545 INFO L124 PetriNetUnfolderBase]: 234/470 cut-off events. [2024-06-27 18:04:45,546 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2024-06-27 18:04:45,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 470 events. 234/470 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2087 event pairs, 46 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1797. Up to 328 conditions per place. [2024-06-27 18:04:45,549 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 56 selfloop transitions, 30 changer transitions 9/98 dead transitions. [2024-06-27 18:04:45,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 98 transitions, 1023 flow [2024-06-27 18:04:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 18:04:45,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-06-27 18:04:45,550 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 768 flow. Second operand 9 states and 107 transitions. [2024-06-27 18:04:45,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 98 transitions, 1023 flow [2024-06-27 18:04:45,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 957 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:45,555 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 738 flow [2024-06-27 18:04:45,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=738, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-06-27 18:04:45,556 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-27 18:04:45,556 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 738 flow [2024-06-27 18:04:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:45,556 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 18:04:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:04:45,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:45,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash -18681741, now seen corresponding path program 11 times [2024-06-27 18:04:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:45,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444204825] [2024-06-27 18:04:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,632 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 18:04:45,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444204825] [2024-06-27 18:04:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444204825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867678222] [2024-06-27 18:04:45,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:45,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:45,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:45,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,845 INFO L124 PetriNetUnfolderBase]: 228/460 cut-off events. [2024-06-27 18:04:45,846 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-06-27 18:04:45,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 460 events. 228/460 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2052 event pairs, 46 based on Foata normal form. 1/461 useless extension candidates. Maximal degree in co-relation 1744. Up to 316 conditions per place. [2024-06-27 18:04:45,848 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 54 selfloop transitions, 28 changer transitions 12/97 dead transitions. [2024-06-27 18:04:45,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 994 flow [2024-06-27 18:04:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 18:04:45,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-06-27 18:04:45,849 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 738 flow. Second operand 9 states and 107 transitions. [2024-06-27 18:04:45,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 994 flow [2024-06-27 18:04:45,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 97 transitions, 925 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:45,854 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 686 flow [2024-06-27 18:04:45,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=686, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2024-06-27 18:04:45,855 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-27 18:04:45,855 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 686 flow [2024-06-27 18:04:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:45,855 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 18:04:45,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:04:45,855 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:45,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash -714757937, now seen corresponding path program 12 times [2024-06-27 18:04:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234604590] [2024-06-27 18:04:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:45,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,930 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 18:04:45,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234604590] [2024-06-27 18:04:45,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234604590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:45,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064028026] [2024-06-27 18:04:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:45,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:45,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:45,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 686 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:45,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:45,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:46,134 INFO L124 PetriNetUnfolderBase]: 232/466 cut-off events. [2024-06-27 18:04:46,135 INFO L125 PetriNetUnfolderBase]: For 1188/1188 co-relation queries the response was YES. [2024-06-27 18:04:46,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 466 events. 232/466 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2038 event pairs, 52 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 1763. Up to 320 conditions per place. [2024-06-27 18:04:46,138 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 58 selfloop transitions, 29 changer transitions 9/99 dead transitions. [2024-06-27 18:04:46,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 1036 flow [2024-06-27 18:04:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-27 18:04:46,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-06-27 18:04:46,139 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 686 flow. Second operand 9 states and 102 transitions. [2024-06-27 18:04:46,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 1036 flow [2024-06-27 18:04:46,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 964 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:46,144 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 767 flow [2024-06-27 18:04:46,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=767, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-27 18:04:46,145 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2024-06-27 18:04:46,145 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 767 flow [2024-06-27 18:04:46,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:46,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:46,146 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 18:04:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:04:46,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:46,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1523044311, now seen corresponding path program 13 times [2024-06-27 18:04:46,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:46,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926103069] [2024-06-27 18:04:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:46,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:46,224 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 18:04:46,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926103069] [2024-06-27 18:04:46,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926103069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:46,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:46,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74785014] [2024-06-27 18:04:46,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:46,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:46,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 767 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:46,437 INFO L124 PetriNetUnfolderBase]: 246/492 cut-off events. [2024-06-27 18:04:46,437 INFO L125 PetriNetUnfolderBase]: For 1231/1231 co-relation queries the response was YES. [2024-06-27 18:04:46,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 492 events. 246/492 cut-off events. For 1231/1231 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2197 event pairs, 50 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1862. Up to 326 conditions per place. [2024-06-27 18:04:46,440 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 57 selfloop transitions, 35 changer transitions 9/104 dead transitions. [2024-06-27 18:04:46,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 104 transitions, 1097 flow [2024-06-27 18:04:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 18:04:46,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-06-27 18:04:46,442 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 767 flow. Second operand 9 states and 107 transitions. [2024-06-27 18:04:46,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 104 transitions, 1097 flow [2024-06-27 18:04:46,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 1055 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:46,447 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 881 flow [2024-06-27 18:04:46,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-06-27 18:04:46,448 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-27 18:04:46,448 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 881 flow [2024-06-27 18:04:46,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:46,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:46,449 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 18:04:46,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:04:46,449 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:46,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1570076671, now seen corresponding path program 14 times [2024-06-27 18:04:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304458525] [2024-06-27 18:04:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:46,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:46,524 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 18:04:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:46,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304458525] [2024-06-27 18:04:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304458525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:46,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:46,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704171011] [2024-06-27 18:04:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:46,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:46,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:46,710 INFO L124 PetriNetUnfolderBase]: 250/500 cut-off events. [2024-06-27 18:04:46,710 INFO L125 PetriNetUnfolderBase]: For 1416/1416 co-relation queries the response was YES. [2024-06-27 18:04:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 500 events. 250/500 cut-off events. For 1416/1416 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2240 event pairs, 37 based on Foata normal form. 1/501 useless extension candidates. Maximal degree in co-relation 1994. Up to 270 conditions per place. [2024-06-27 18:04:46,714 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 60 selfloop transitions, 35 changer transitions 9/107 dead transitions. [2024-06-27 18:04:46,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 107 transitions, 1194 flow [2024-06-27 18:04:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-27 18:04:46,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156378600823045 [2024-06-27 18:04:46,715 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 881 flow. Second operand 9 states and 101 transitions. [2024-06-27 18:04:46,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 107 transitions, 1194 flow [2024-06-27 18:04:46,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 1133 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:46,721 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 910 flow [2024-06-27 18:04:46,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=910, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2024-06-27 18:04:46,722 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 69 predicate places. [2024-06-27 18:04:46,722 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 910 flow [2024-06-27 18:04:46,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:46,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:46,722 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 18:04:46,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:04:46,722 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:46,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1267798731, now seen corresponding path program 15 times [2024-06-27 18:04:46,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:46,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098529349] [2024-06-27 18:04:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:46,811 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 18:04:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:46,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098529349] [2024-06-27 18:04:46,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098529349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:46,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:46,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:46,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871747388] [2024-06-27 18:04:46,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:46,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:46,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:46,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:46,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:46,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:46,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:46,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:47,000 INFO L124 PetriNetUnfolderBase]: 254/508 cut-off events. [2024-06-27 18:04:47,000 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2024-06-27 18:04:47,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2109 conditions, 508 events. 254/508 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2283 event pairs, 54 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 2059. Up to 354 conditions per place. [2024-06-27 18:04:47,004 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 64 selfloop transitions, 31 changer transitions 9/107 dead transitions. [2024-06-27 18:04:47,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 1231 flow [2024-06-27 18:04:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-27 18:04:47,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279835390946502 [2024-06-27 18:04:47,005 INFO L175 Difference]: Start difference. First operand has 98 places, 84 transitions, 910 flow. Second operand 9 states and 104 transitions. [2024-06-27 18:04:47,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 1231 flow [2024-06-27 18:04:47,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 1159 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:47,011 INFO L231 Difference]: Finished difference. Result has 101 places, 85 transitions, 923 flow [2024-06-27 18:04:47,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=923, PETRI_PLACES=101, PETRI_TRANSITIONS=85} [2024-06-27 18:04:47,012 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-27 18:04:47,012 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 923 flow [2024-06-27 18:04:47,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:47,012 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 18:04:47,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:04:47,013 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:47,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash -35419659, now seen corresponding path program 16 times [2024-06-27 18:04:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:47,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067336064] [2024-06-27 18:04:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:47,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:47,092 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 18:04:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067336064] [2024-06-27 18:04:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067336064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:47,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:47,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:47,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046444232] [2024-06-27 18:04:47,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:47,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:47,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:47,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:47,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 923 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:47,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:47,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:47,293 INFO L124 PetriNetUnfolderBase]: 251/506 cut-off events. [2024-06-27 18:04:47,294 INFO L125 PetriNetUnfolderBase]: For 1702/1702 co-relation queries the response was YES. [2024-06-27 18:04:47,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 506 events. 251/506 cut-off events. For 1702/1702 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2294 event pairs, 54 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 2042. Up to 358 conditions per place. [2024-06-27 18:04:47,298 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 62 selfloop transitions, 29 changer transitions 12/106 dead transitions. [2024-06-27 18:04:47,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 106 transitions, 1230 flow [2024-06-27 18:04:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-27 18:04:47,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-06-27 18:04:47,299 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 923 flow. Second operand 9 states and 102 transitions. [2024-06-27 18:04:47,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 106 transitions, 1230 flow [2024-06-27 18:04:47,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 1154 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:47,305 INFO L231 Difference]: Finished difference. Result has 102 places, 83 transitions, 874 flow [2024-06-27 18:04:47,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=874, PETRI_PLACES=102, PETRI_TRANSITIONS=83} [2024-06-27 18:04:47,306 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-27 18:04:47,306 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 83 transitions, 874 flow [2024-06-27 18:04:47,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:47,306 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 18:04:47,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:04:47,307 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:47,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 778261639, now seen corresponding path program 17 times [2024-06-27 18:04:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:47,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912306387] [2024-06-27 18:04:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:47,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:47,377 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 18:04:47,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912306387] [2024-06-27 18:04:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912306387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:47,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:47,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883371959] [2024-06-27 18:04:47,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:47,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:47,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:47,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:47,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:47,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:47,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 83 transitions, 874 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:47,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:47,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:47,604 INFO L124 PetriNetUnfolderBase]: 243/491 cut-off events. [2024-06-27 18:04:47,604 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2024-06-27 18:04:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 491 events. 243/491 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2191 event pairs, 54 based on Foata normal form. 1/492 useless extension candidates. Maximal degree in co-relation 1936. Up to 348 conditions per place. [2024-06-27 18:04:47,607 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 58 selfloop transitions, 31 changer transitions 9/101 dead transitions. [2024-06-27 18:04:47,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 101 transitions, 1144 flow [2024-06-27 18:04:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-27 18:04:47,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-27 18:04:47,608 INFO L175 Difference]: Start difference. First operand has 102 places, 83 transitions, 874 flow. Second operand 9 states and 105 transitions. [2024-06-27 18:04:47,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 101 transitions, 1144 flow [2024-06-27 18:04:47,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 1082 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:47,613 INFO L231 Difference]: Finished difference. Result has 100 places, 81 transitions, 847 flow [2024-06-27 18:04:47,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=847, PETRI_PLACES=100, PETRI_TRANSITIONS=81} [2024-06-27 18:04:47,614 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 71 predicate places. [2024-06-27 18:04:47,614 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 81 transitions, 847 flow [2024-06-27 18:04:47,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:47,614 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 18:04:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:04:47,614 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1543365049, now seen corresponding path program 18 times [2024-06-27 18:04:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268436751] [2024-06-27 18:04:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:47,696 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 18:04:47,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:47,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268436751] [2024-06-27 18:04:47,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268436751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:47,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:47,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:47,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734635977] [2024-06-27 18:04:47,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:47,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:47,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:47,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:47,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 81 transitions, 847 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:47,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:47,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:47,937 INFO L124 PetriNetUnfolderBase]: 237/481 cut-off events. [2024-06-27 18:04:47,937 INFO L125 PetriNetUnfolderBase]: For 1519/1519 co-relation queries the response was YES. [2024-06-27 18:04:47,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 481 events. 237/481 cut-off events. For 1519/1519 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2138 event pairs, 54 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 1885. Up to 336 conditions per place. [2024-06-27 18:04:47,941 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 56 selfloop transitions, 29 changer transitions 12/100 dead transitions. [2024-06-27 18:04:47,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 1118 flow [2024-06-27 18:04:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-27 18:04:47,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-27 18:04:47,942 INFO L175 Difference]: Start difference. First operand has 100 places, 81 transitions, 847 flow. Second operand 9 states and 105 transitions. [2024-06-27 18:04:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 1118 flow [2024-06-27 18:04:47,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 1050 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:47,949 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 795 flow [2024-06-27 18:04:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=795, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2024-06-27 18:04:47,949 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-27 18:04:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 795 flow [2024-06-27 18:04:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:47,950 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 18:04:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:04:47,951 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:47,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1220501639, now seen corresponding path program 19 times [2024-06-27 18:04:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925337669] [2024-06-27 18:04:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,035 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 18:04:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925337669] [2024-06-27 18:04:48,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925337669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:48,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:48,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047825042] [2024-06-27 18:04:48,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:48,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:48,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:48,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:48,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 795 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:48,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:48,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:48,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:48,270 INFO L124 PetriNetUnfolderBase]: 229/466 cut-off events. [2024-06-27 18:04:48,270 INFO L125 PetriNetUnfolderBase]: For 1426/1426 co-relation queries the response was YES. [2024-06-27 18:04:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 466 events. 229/466 cut-off events. For 1426/1426 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2055 event pairs, 54 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 1798. Up to 324 conditions per place. [2024-06-27 18:04:48,273 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 56 selfloop transitions, 28 changer transitions 10/97 dead transitions. [2024-06-27 18:04:48,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 97 transitions, 1060 flow [2024-06-27 18:04:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-27 18:04:48,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279835390946502 [2024-06-27 18:04:48,273 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 795 flow. Second operand 9 states and 104 transitions. [2024-06-27 18:04:48,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 97 transitions, 1060 flow [2024-06-27 18:04:48,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 998 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:48,279 INFO L231 Difference]: Finished difference. Result has 100 places, 76 transitions, 762 flow [2024-06-27 18:04:48,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=100, PETRI_TRANSITIONS=76} [2024-06-27 18:04:48,283 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 71 predicate places. [2024-06-27 18:04:48,284 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 76 transitions, 762 flow [2024-06-27 18:04:48,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:48,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,284 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 18:04:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:04:48,284 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:48,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 190516317, now seen corresponding path program 20 times [2024-06-27 18:04:48,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744996334] [2024-06-27 18:04:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,387 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 18:04:48,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744996334] [2024-06-27 18:04:48,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744996334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:48,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:48,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:48,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382804827] [2024-06-27 18:04:48,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:48,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:48,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:48,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:48,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 76 transitions, 762 flow. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:48,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:48,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:48,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:48,578 INFO L124 PetriNetUnfolderBase]: 222/454 cut-off events. [2024-06-27 18:04:48,578 INFO L125 PetriNetUnfolderBase]: For 1332/1332 co-relation queries the response was YES. [2024-06-27 18:04:48,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 454 events. 222/454 cut-off events. For 1332/1332 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1969 event pairs, 54 based on Foata normal form. 1/455 useless extension candidates. Maximal degree in co-relation 1734. Up to 314 conditions per place. [2024-06-27 18:04:48,580 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 54 selfloop transitions, 26 changer transitions 11/94 dead transitions. [2024-06-27 18:04:48,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 94 transitions, 1018 flow [2024-06-27 18:04:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-27 18:04:48,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-06-27 18:04:48,581 INFO L175 Difference]: Start difference. First operand has 100 places, 76 transitions, 762 flow. Second operand 9 states and 102 transitions. [2024-06-27 18:04:48,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 94 transitions, 1018 flow [2024-06-27 18:04:48,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 956 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:48,585 INFO L231 Difference]: Finished difference. Result has 101 places, 73 transitions, 710 flow [2024-06-27 18:04:48,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=710, PETRI_PLACES=101, PETRI_TRANSITIONS=73} [2024-06-27 18:04:48,586 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-27 18:04:48,586 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 710 flow [2024-06-27 18:04:48,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 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 18:04:48,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,586 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 18:04:48,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:04:48,586 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:48,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,587 INFO L85 PathProgramCache]: Analyzing trace with hash -442196089, now seen corresponding path program 1 times [2024-06-27 18:04:48,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131780443] [2024-06-27 18:04:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,607 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 18:04:48,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131780443] [2024-06-27 18:04:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131780443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:48,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:48,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:48,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927778548] [2024-06-27 18:04:48,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:48,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:48,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:48,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:48,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:48,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 73 transitions, 710 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:48,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:48,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:48,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:48,715 INFO L124 PetriNetUnfolderBase]: 270/642 cut-off events. [2024-06-27 18:04:48,715 INFO L125 PetriNetUnfolderBase]: For 1989/1991 co-relation queries the response was YES. [2024-06-27 18:04:48,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2514 conditions, 642 events. 270/642 cut-off events. For 1989/1991 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3669 event pairs, 55 based on Foata normal form. 14/641 useless extension candidates. Maximal degree in co-relation 2440. Up to 168 conditions per place. [2024-06-27 18:04:48,718 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 60 selfloop transitions, 29 changer transitions 5/117 dead transitions. [2024-06-27 18:04:48,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 117 transitions, 1189 flow [2024-06-27 18:04:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 18:04:48,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-27 18:04:48,720 INFO L175 Difference]: Start difference. First operand has 101 places, 73 transitions, 710 flow. Second operand 7 states and 115 transitions. [2024-06-27 18:04:48,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 117 transitions, 1189 flow [2024-06-27 18:04:48,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 117 transitions, 1125 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:48,726 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 919 flow [2024-06-27 18:04:48,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2024-06-27 18:04:48,726 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-27 18:04:48,726 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 919 flow [2024-06-27 18:04:48,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:48,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,726 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 18:04:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:04:48,727 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:48,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash 302303677, now seen corresponding path program 2 times [2024-06-27 18:04:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129318819] [2024-06-27 18:04:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,747 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 18:04:48,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129318819] [2024-06-27 18:04:48,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129318819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:48,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:48,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321487889] [2024-06-27 18:04:48,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:48,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:48,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:48,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 919 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:48,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:48,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:48,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:48,860 INFO L124 PetriNetUnfolderBase]: 303/729 cut-off events. [2024-06-27 18:04:48,860 INFO L125 PetriNetUnfolderBase]: For 3062/3064 co-relation queries the response was YES. [2024-06-27 18:04:48,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2984 conditions, 729 events. 303/729 cut-off events. For 3062/3064 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4347 event pairs, 106 based on Foata normal form. 10/715 useless extension candidates. Maximal degree in co-relation 2859. Up to 296 conditions per place. [2024-06-27 18:04:48,864 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 74 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-06-27 18:04:48,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 118 transitions, 1304 flow [2024-06-27 18:04:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 18:04:48,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962962962962963 [2024-06-27 18:04:48,866 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 919 flow. Second operand 5 states and 94 transitions. [2024-06-27 18:04:48,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 118 transitions, 1304 flow [2024-06-27 18:04:48,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 118 transitions, 1220 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:48,874 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 986 flow [2024-06-27 18:04:48,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=986, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2024-06-27 18:04:48,874 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 76 predicate places. [2024-06-27 18:04:48,874 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 986 flow [2024-06-27 18:04:48,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:48,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,874 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 18:04:48,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:04:48,874 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:48,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1231660428, now seen corresponding path program 1 times [2024-06-27 18:04:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181456403] [2024-06-27 18:04:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181456403] [2024-06-27 18:04:48,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181456403] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:48,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497971931] [2024-06-27 18:04:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:48,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:48,921 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 18:04:48,940 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 18:04:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 18:04:48,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:49,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:49,035 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 18:04:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497971931] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:49,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:04:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-06-27 18:04:49,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092940654] [2024-06-27 18:04:49,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:49,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:49,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:49,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 986 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:49,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:49,209 INFO L124 PetriNetUnfolderBase]: 410/1017 cut-off events. [2024-06-27 18:04:49,209 INFO L125 PetriNetUnfolderBase]: For 3486/3494 co-relation queries the response was YES. [2024-06-27 18:04:49,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4026 conditions, 1017 events. 410/1017 cut-off events. For 3486/3494 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6889 event pairs, 72 based on Foata normal form. 17/998 useless extension candidates. Maximal degree in co-relation 3663. Up to 394 conditions per place. [2024-06-27 18:04:49,214 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 68 selfloop transitions, 37 changer transitions 0/128 dead transitions. [2024-06-27 18:04:49,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 128 transitions, 1442 flow [2024-06-27 18:04:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 18:04:49,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962962962962963 [2024-06-27 18:04:49,216 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 986 flow. Second operand 5 states and 94 transitions. [2024-06-27 18:04:49,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 128 transitions, 1442 flow [2024-06-27 18:04:49,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 128 transitions, 1387 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:49,225 INFO L231 Difference]: Finished difference. Result has 111 places, 102 transitions, 1214 flow [2024-06-27 18:04:49,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1214, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2024-06-27 18:04:49,226 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 82 predicate places. [2024-06-27 18:04:49,226 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 1214 flow [2024-06-27 18:04:49,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:49,226 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 18:04:49,241 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 18:04:49,438 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,SelfDestructingSolverStorable31 [2024-06-27 18:04:49,439 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:49,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1989714163, now seen corresponding path program 3 times [2024-06-27 18:04:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:49,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795624286] [2024-06-27 18:04:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:49,461 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 18:04:49,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:49,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795624286] [2024-06-27 18:04:49,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795624286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:49,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:49,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:49,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747723973] [2024-06-27 18:04:49,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:49,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:49,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:49,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 1214 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:49,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:49,610 INFO L124 PetriNetUnfolderBase]: 399/1012 cut-off events. [2024-06-27 18:04:49,611 INFO L125 PetriNetUnfolderBase]: For 4221/4230 co-relation queries the response was YES. [2024-06-27 18:04:49,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 1012 events. 399/1012 cut-off events. For 4221/4230 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6930 event pairs, 103 based on Foata normal form. 16/1004 useless extension candidates. Maximal degree in co-relation 3920. Up to 196 conditions per place. [2024-06-27 18:04:49,617 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 79 selfloop transitions, 31 changer transitions 4/137 dead transitions. [2024-06-27 18:04:49,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 137 transitions, 1619 flow [2024-06-27 18:04:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 18:04:49,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157407407407407 [2024-06-27 18:04:49,618 INFO L175 Difference]: Start difference. First operand has 111 places, 102 transitions, 1214 flow. Second operand 8 states and 133 transitions. [2024-06-27 18:04:49,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 137 transitions, 1619 flow [2024-06-27 18:04:49,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 137 transitions, 1607 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:49,629 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 1262 flow [2024-06-27 18:04:49,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2024-06-27 18:04:49,630 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2024-06-27 18:04:49,630 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 1262 flow [2024-06-27 18:04:49,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:49,630 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 18:04:49,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:04:49,630 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:49,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:49,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1379738806, now seen corresponding path program 2 times [2024-06-27 18:04:49,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:49,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072860269] [2024-06-27 18:04:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:49,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:49,654 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 18:04:49,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:49,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072860269] [2024-06-27 18:04:49,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072860269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:49,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:49,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:49,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121841067] [2024-06-27 18:04:49,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:49,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:49,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:49,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:49,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 1262 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:49,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:49,784 INFO L124 PetriNetUnfolderBase]: 359/906 cut-off events. [2024-06-27 18:04:49,784 INFO L125 PetriNetUnfolderBase]: For 4169/4177 co-relation queries the response was YES. [2024-06-27 18:04:49,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3857 conditions, 906 events. 359/906 cut-off events. For 4169/4177 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6024 event pairs, 63 based on Foata normal form. 20/898 useless extension candidates. Maximal degree in co-relation 3638. Up to 351 conditions per place. [2024-06-27 18:04:49,790 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 69 selfloop transitions, 26 changer transitions 3/120 dead transitions. [2024-06-27 18:04:49,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 120 transitions, 1546 flow [2024-06-27 18:04:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:04:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:04:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 18:04:49,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-27 18:04:49,791 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 1262 flow. Second operand 6 states and 101 transitions. [2024-06-27 18:04:49,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 120 transitions, 1546 flow [2024-06-27 18:04:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 1478 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:49,803 INFO L231 Difference]: Finished difference. Result has 121 places, 93 transitions, 1149 flow [2024-06-27 18:04:49,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1149, PETRI_PLACES=121, PETRI_TRANSITIONS=93} [2024-06-27 18:04:49,803 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-27 18:04:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 93 transitions, 1149 flow [2024-06-27 18:04:49,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:49,804 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 18:04:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:04:49,804 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:49,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2102206553, now seen corresponding path program 4 times [2024-06-27 18:04:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892470336] [2024-06-27 18:04:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:49,839 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 18:04:49,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:49,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892470336] [2024-06-27 18:04:49,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892470336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:49,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:49,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:49,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930762259] [2024-06-27 18:04:49,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:49,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:49,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:49,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:49,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 93 transitions, 1149 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:49,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:49,960 INFO L124 PetriNetUnfolderBase]: 301/732 cut-off events. [2024-06-27 18:04:49,961 INFO L125 PetriNetUnfolderBase]: For 3949/3955 co-relation queries the response was YES. [2024-06-27 18:04:49,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 732 events. 301/732 cut-off events. For 3949/3955 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4380 event pairs, 70 based on Foata normal form. 14/726 useless extension candidates. Maximal degree in co-relation 3055. Up to 412 conditions per place. [2024-06-27 18:04:49,966 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 65 selfloop transitions, 21 changer transitions 1/109 dead transitions. [2024-06-27 18:04:49,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 109 transitions, 1371 flow [2024-06-27 18:04:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-27 18:04:49,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-27 18:04:49,967 INFO L175 Difference]: Start difference. First operand has 121 places, 93 transitions, 1149 flow. Second operand 5 states and 86 transitions. [2024-06-27 18:04:49,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 109 transitions, 1371 flow [2024-06-27 18:04:49,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 109 transitions, 1316 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:49,978 INFO L231 Difference]: Finished difference. Result has 119 places, 91 transitions, 1083 flow [2024-06-27 18:04:49,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1083, PETRI_PLACES=119, PETRI_TRANSITIONS=91} [2024-06-27 18:04:49,978 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2024-06-27 18:04:49,978 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 91 transitions, 1083 flow [2024-06-27 18:04:49,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:49,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:49,979 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 18:04:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:04:49,979 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:49,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1111819476, now seen corresponding path program 3 times [2024-06-27 18:04:49,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:49,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108080490] [2024-06-27 18:04:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,002 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 18:04:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108080490] [2024-06-27 18:04:50,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108080490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:50,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:50,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906345679] [2024-06-27 18:04:50,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:50,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:50,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:50,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:50,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 91 transitions, 1083 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:50,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:50,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:50,122 INFO L124 PetriNetUnfolderBase]: 376/884 cut-off events. [2024-06-27 18:04:50,123 INFO L125 PetriNetUnfolderBase]: For 4513/4517 co-relation queries the response was YES. [2024-06-27 18:04:50,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3898 conditions, 884 events. 376/884 cut-off events. For 4513/4517 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5483 event pairs, 174 based on Foata normal form. 11/867 useless extension candidates. Maximal degree in co-relation 3729. Up to 555 conditions per place. [2024-06-27 18:04:50,128 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 74 selfloop transitions, 33 changer transitions 0/129 dead transitions. [2024-06-27 18:04:50,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 129 transitions, 1672 flow [2024-06-27 18:04:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 18:04:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-27 18:04:50,130 INFO L175 Difference]: Start difference. First operand has 119 places, 91 transitions, 1083 flow. Second operand 5 states and 89 transitions. [2024-06-27 18:04:50,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 129 transitions, 1672 flow [2024-06-27 18:04:50,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 129 transitions, 1606 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:50,140 INFO L231 Difference]: Finished difference. Result has 119 places, 107 transitions, 1376 flow [2024-06-27 18:04:50,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1376, PETRI_PLACES=119, PETRI_TRANSITIONS=107} [2024-06-27 18:04:50,141 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2024-06-27 18:04:50,141 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 107 transitions, 1376 flow [2024-06-27 18:04:50,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:50,141 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 18:04:50,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:04:50,142 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:50,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:50,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1927936020, now seen corresponding path program 4 times [2024-06-27 18:04:50,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:50,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102840061] [2024-06-27 18:04:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,164 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 18:04:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102840061] [2024-06-27 18:04:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102840061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:50,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:50,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:50,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174117990] [2024-06-27 18:04:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:50,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:50,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:50,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 107 transitions, 1376 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:50,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:50,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:50,291 INFO L124 PetriNetUnfolderBase]: 367/872 cut-off events. [2024-06-27 18:04:50,291 INFO L125 PetriNetUnfolderBase]: For 4674/4678 co-relation queries the response was YES. [2024-06-27 18:04:50,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 872 events. 367/872 cut-off events. For 4674/4678 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5463 event pairs, 95 based on Foata normal form. 12/858 useless extension candidates. Maximal degree in co-relation 3692. Up to 403 conditions per place. [2024-06-27 18:04:50,296 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 69 selfloop transitions, 35 changer transitions 3/129 dead transitions. [2024-06-27 18:04:50,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 129 transitions, 1726 flow [2024-06-27 18:04:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:04:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:04:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 18:04:50,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-27 18:04:50,297 INFO L175 Difference]: Start difference. First operand has 119 places, 107 transitions, 1376 flow. Second operand 7 states and 110 transitions. [2024-06-27 18:04:50,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 129 transitions, 1726 flow [2024-06-27 18:04:50,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 129 transitions, 1718 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 18:04:50,310 INFO L231 Difference]: Finished difference. Result has 126 places, 107 transitions, 1458 flow [2024-06-27 18:04:50,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1458, PETRI_PLACES=126, PETRI_TRANSITIONS=107} [2024-06-27 18:04:50,310 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2024-06-27 18:04:50,310 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 107 transitions, 1458 flow [2024-06-27 18:04:50,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:50,311 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 18:04:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:04:50,311 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:50,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash -792596155, now seen corresponding path program 5 times [2024-06-27 18:04:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682387619] [2024-06-27 18:04:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,332 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 18:04:50,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682387619] [2024-06-27 18:04:50,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682387619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:50,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:50,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:50,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921555307] [2024-06-27 18:04:50,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:50,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:50,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:50,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:50,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:50,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:50,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 107 transitions, 1458 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:50,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:50,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:50,467 INFO L124 PetriNetUnfolderBase]: 314/746 cut-off events. [2024-06-27 18:04:50,467 INFO L125 PetriNetUnfolderBase]: For 4519/4521 co-relation queries the response was YES. [2024-06-27 18:04:50,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3536 conditions, 746 events. 314/746 cut-off events. For 4519/4521 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4386 event pairs, 63 based on Foata normal form. 16/742 useless extension candidates. Maximal degree in co-relation 3451. Up to 218 conditions per place. [2024-06-27 18:04:50,471 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 73 selfloop transitions, 23 changer transitions 3/120 dead transitions. [2024-06-27 18:04:50,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 1688 flow [2024-06-27 18:04:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:04:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:04:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 18:04:50,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-06-27 18:04:50,473 INFO L175 Difference]: Start difference. First operand has 126 places, 107 transitions, 1458 flow. Second operand 6 states and 97 transitions. [2024-06-27 18:04:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 1688 flow [2024-06-27 18:04:50,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 120 transitions, 1618 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:50,483 INFO L231 Difference]: Finished difference. Result has 126 places, 98 transitions, 1287 flow [2024-06-27 18:04:50,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1287, PETRI_PLACES=126, PETRI_TRANSITIONS=98} [2024-06-27 18:04:50,484 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2024-06-27 18:04:50,484 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 98 transitions, 1287 flow [2024-06-27 18:04:50,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:50,484 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 18:04:50,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:04:50,485 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:50,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash -357847096, now seen corresponding path program 5 times [2024-06-27 18:04:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:50,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895082027] [2024-06-27 18:04:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,509 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 18:04:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895082027] [2024-06-27 18:04:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895082027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:50,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568137051] [2024-06-27 18:04:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:50,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:50,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:04:50,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 98 transitions, 1287 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:50,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:04:50,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:50,631 INFO L124 PetriNetUnfolderBase]: 275/639 cut-off events. [2024-06-27 18:04:50,631 INFO L125 PetriNetUnfolderBase]: For 4110/4112 co-relation queries the response was YES. [2024-06-27 18:04:50,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3081 conditions, 639 events. 275/639 cut-off events. For 4110/4112 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3551 event pairs, 66 based on Foata normal form. 6/629 useless extension candidates. Maximal degree in co-relation 2714. Up to 202 conditions per place. [2024-06-27 18:04:50,634 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 64 selfloop transitions, 31 changer transitions 2/118 dead transitions. [2024-06-27 18:04:50,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 118 transitions, 1537 flow [2024-06-27 18:04:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 18:04:50,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-06-27 18:04:50,635 INFO L175 Difference]: Start difference. First operand has 126 places, 98 transitions, 1287 flow. Second operand 8 states and 125 transitions. [2024-06-27 18:04:50,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 118 transitions, 1537 flow [2024-06-27 18:04:50,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 118 transitions, 1476 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:50,645 INFO L231 Difference]: Finished difference. Result has 124 places, 93 transitions, 1211 flow [2024-06-27 18:04:50,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1211, PETRI_PLACES=124, PETRI_TRANSITIONS=93} [2024-06-27 18:04:50,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-27 18:04:50,646 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 93 transitions, 1211 flow [2024-06-27 18:04:50,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 18:04:50,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:50,646 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 18:04:50,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:04:50,646 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:50,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash 554362692, now seen corresponding path program 1 times [2024-06-27 18:04:50,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:50,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059221160] [2024-06-27 18:04:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059221160] [2024-06-27 18:04:50,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059221160] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98630621] [2024-06-27 18:04:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:50,740 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 18:04:50,777 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 18:04:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:04:50,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:50,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:51,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98630621] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:51,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:51,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:04:51,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470713763] [2024-06-27 18:04:51,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:51,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:04:51,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:04:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:04:51,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:51,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 93 transitions, 1211 flow. Second operand has 23 states, 23 states have (on average 6.826086956521739) internal successors, (157), 23 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:51,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:51,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:51,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:52,337 INFO L124 PetriNetUnfolderBase]: 827/1676 cut-off events. [2024-06-27 18:04:52,337 INFO L125 PetriNetUnfolderBase]: For 9428/9428 co-relation queries the response was YES. [2024-06-27 18:04:52,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7672 conditions, 1676 events. 827/1676 cut-off events. For 9428/9428 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 10427 event pairs, 80 based on Foata normal form. 2/1678 useless extension candidates. Maximal degree in co-relation 7097. Up to 321 conditions per place. [2024-06-27 18:04:52,347 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 136 selfloop transitions, 101 changer transitions 66/306 dead transitions. [2024-06-27 18:04:52,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 306 transitions, 3639 flow [2024-06-27 18:04:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 18:04:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 18:04:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 390 transitions. [2024-06-27 18:04:52,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012345679012346 [2024-06-27 18:04:52,350 INFO L175 Difference]: Start difference. First operand has 124 places, 93 transitions, 1211 flow. Second operand 36 states and 390 transitions. [2024-06-27 18:04:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 306 transitions, 3639 flow [2024-06-27 18:04:52,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 306 transitions, 3426 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:52,367 INFO L231 Difference]: Finished difference. Result has 168 places, 148 transitions, 2233 flow [2024-06-27 18:04:52,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2233, PETRI_PLACES=168, PETRI_TRANSITIONS=148} [2024-06-27 18:04:52,368 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2024-06-27 18:04:52,368 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 148 transitions, 2233 flow [2024-06-27 18:04:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.826086956521739) internal successors, (157), 23 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:52,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:52,368 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 18:04:52,382 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 18:04:52,579 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,SelfDestructingSolverStorable39 [2024-06-27 18:04:52,580 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:52,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 492487304, now seen corresponding path program 2 times [2024-06-27 18:04:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350541479] [2024-06-27 18:04:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:52,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350541479] [2024-06-27 18:04:52,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350541479] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:52,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247205024] [2024-06-27 18:04:52,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:04:52,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:52,717 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 18:04:52,743 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 18:04:52,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:04:52,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:52,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:04:52,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:52,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247205024] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:53,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:04:53,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067671510] [2024-06-27 18:04:53,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:53,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:04:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:04:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:04:53,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:53,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 148 transitions, 2233 flow. Second operand has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 18:04:53,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:53,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:53,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:53,809 INFO L124 PetriNetUnfolderBase]: 990/2069 cut-off events. [2024-06-27 18:04:53,809 INFO L125 PetriNetUnfolderBase]: For 13828/13828 co-relation queries the response was YES. [2024-06-27 18:04:53,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10028 conditions, 2069 events. 990/2069 cut-off events. For 13828/13828 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 14288 event pairs, 155 based on Foata normal form. 4/2073 useless extension candidates. Maximal degree in co-relation 9816. Up to 969 conditions per place. [2024-06-27 18:04:53,823 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 116 selfloop transitions, 124 changer transitions 18/261 dead transitions. [2024-06-27 18:04:53,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 261 transitions, 4074 flow [2024-06-27 18:04:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:04:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:04:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 175 transitions. [2024-06-27 18:04:53,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050925925925926 [2024-06-27 18:04:53,825 INFO L175 Difference]: Start difference. First operand has 168 places, 148 transitions, 2233 flow. Second operand 16 states and 175 transitions. [2024-06-27 18:04:53,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 261 transitions, 4074 flow [2024-06-27 18:04:53,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 261 transitions, 3591 flow, removed 140 selfloop flow, removed 15 redundant places. [2024-06-27 18:04:53,861 INFO L231 Difference]: Finished difference. Result has 163 places, 194 transitions, 2943 flow [2024-06-27 18:04:53,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2943, PETRI_PLACES=163, PETRI_TRANSITIONS=194} [2024-06-27 18:04:53,862 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2024-06-27 18:04:53,862 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 194 transitions, 2943 flow [2024-06-27 18:04:53,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 18:04:53,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:53,862 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 18:04:53,876 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 18:04:54,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:54,075 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:54,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:54,075 INFO L85 PathProgramCache]: Analyzing trace with hash 623389412, now seen corresponding path program 3 times [2024-06-27 18:04:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:54,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118171485] [2024-06-27 18:04:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:54,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:54,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118171485] [2024-06-27 18:04:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118171485] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776534692] [2024-06-27 18:04:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:04:54,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:54,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:54,176 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 18:04:54,188 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 18:04:54,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:04:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:54,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:04:54,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:54,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:54,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776534692] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:54,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:54,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-06-27 18:04:54,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666124339] [2024-06-27 18:04:54,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:54,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:04:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:04:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:04:54,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:54,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 194 transitions, 2943 flow. Second operand has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:04:54,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:54,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:54,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:55,114 INFO L124 PetriNetUnfolderBase]: 949/1977 cut-off events. [2024-06-27 18:04:55,114 INFO L125 PetriNetUnfolderBase]: For 13945/13945 co-relation queries the response was YES. [2024-06-27 18:04:55,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9571 conditions, 1977 events. 949/1977 cut-off events. For 13945/13945 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 13449 event pairs, 91 based on Foata normal form. 7/1984 useless extension candidates. Maximal degree in co-relation 9407. Up to 955 conditions per place. [2024-06-27 18:04:55,125 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 107 selfloop transitions, 135 changer transitions 23/268 dead transitions. [2024-06-27 18:04:55,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 268 transitions, 4116 flow [2024-06-27 18:04:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:04:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:04:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 201 transitions. [2024-06-27 18:04:55,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41358024691358025 [2024-06-27 18:04:55,126 INFO L175 Difference]: Start difference. First operand has 163 places, 194 transitions, 2943 flow. Second operand 18 states and 201 transitions. [2024-06-27 18:04:55,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 268 transitions, 4116 flow [2024-06-27 18:04:55,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 268 transitions, 4055 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:55,161 INFO L231 Difference]: Finished difference. Result has 177 places, 199 transitions, 3302 flow [2024-06-27 18:04:55,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3302, PETRI_PLACES=177, PETRI_TRANSITIONS=199} [2024-06-27 18:04:55,162 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 148 predicate places. [2024-06-27 18:04:55,162 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 199 transitions, 3302 flow [2024-06-27 18:04:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:04:55,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:55,162 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 18:04:55,190 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 18:04:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:55,376 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:55,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1133777018, now seen corresponding path program 4 times [2024-06-27 18:04:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:55,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942173565] [2024-06-27 18:04:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:55,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942173565] [2024-06-27 18:04:55,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942173565] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:55,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510462102] [2024-06-27 18:04:55,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:04:55,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:55,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:55,473 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 18:04:55,511 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 18:04:55,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:04:55,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:55,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:04:55,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510462102] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:55,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:04:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174864417] [2024-06-27 18:04:55,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:55,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:04:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:04:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:04:55,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:55,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 199 transitions, 3302 flow. Second operand has 23 states, 23 states have (on average 6.434782608695652) internal successors, (148), 23 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 18:04:55,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:55,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:55,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:56,436 INFO L124 PetriNetUnfolderBase]: 1058/2164 cut-off events. [2024-06-27 18:04:56,436 INFO L125 PetriNetUnfolderBase]: For 18253/18253 co-relation queries the response was YES. [2024-06-27 18:04:56,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11594 conditions, 2164 events. 1058/2164 cut-off events. For 18253/18253 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14630 event pairs, 79 based on Foata normal form. 8/2172 useless extension candidates. Maximal degree in co-relation 11431. Up to 656 conditions per place. [2024-06-27 18:04:56,451 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 91 selfloop transitions, 161 changer transitions 46/301 dead transitions. [2024-06-27 18:04:56,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 301 transitions, 5179 flow [2024-06-27 18:04:56,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:04:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:04:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 194 transitions. [2024-06-27 18:04:56,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991769547325103 [2024-06-27 18:04:56,456 INFO L175 Difference]: Start difference. First operand has 177 places, 199 transitions, 3302 flow. Second operand 18 states and 194 transitions. [2024-06-27 18:04:56,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 301 transitions, 5179 flow [2024-06-27 18:04:56,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 301 transitions, 5078 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:56,501 INFO L231 Difference]: Finished difference. Result has 192 places, 216 transitions, 4017 flow [2024-06-27 18:04:56,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4017, PETRI_PLACES=192, PETRI_TRANSITIONS=216} [2024-06-27 18:04:56,502 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-27 18:04:56,502 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 216 transitions, 4017 flow [2024-06-27 18:04:56,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.434782608695652) internal successors, (148), 23 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 18:04:56,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:56,503 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 18:04:56,528 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 18:04:56,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:56,715 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:56,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1106326176, now seen corresponding path program 5 times [2024-06-27 18:04:56,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:56,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796708024] [2024-06-27 18:04:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:56,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:56,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:56,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796708024] [2024-06-27 18:04:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796708024] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510777811] [2024-06-27 18:04:56,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:04:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:56,827 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 18:04:56,852 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 18:04:56,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:04:56,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:56,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:04:56,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:56,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:04:56,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510777811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:56,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:04:56,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-06-27 18:04:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282822743] [2024-06-27 18:04:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:56,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-06-27 18:04:56,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:56,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 4017 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:04:56,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:56,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:56,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:57,286 INFO L124 PetriNetUnfolderBase]: 900/1831 cut-off events. [2024-06-27 18:04:57,286 INFO L125 PetriNetUnfolderBase]: For 20170/20170 co-relation queries the response was YES. [2024-06-27 18:04:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10965 conditions, 1831 events. 900/1831 cut-off events. For 20170/20170 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11738 event pairs, 212 based on Foata normal form. 3/1834 useless extension candidates. Maximal degree in co-relation 10808. Up to 1015 conditions per place. [2024-06-27 18:04:57,298 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 144 selfloop transitions, 85 changer transitions 18/250 dead transitions. [2024-06-27 18:04:57,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 250 transitions, 4862 flow [2024-06-27 18:04:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-27 18:04:57,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 18:04:57,299 INFO L175 Difference]: Start difference. First operand has 192 places, 216 transitions, 4017 flow. Second operand 9 states and 108 transitions. [2024-06-27 18:04:57,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 250 transitions, 4862 flow [2024-06-27 18:04:57,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 250 transitions, 4467 flow, removed 94 selfloop flow, removed 11 redundant places. [2024-06-27 18:04:57,369 INFO L231 Difference]: Finished difference. Result has 184 places, 207 transitions, 3656 flow [2024-06-27 18:04:57,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3656, PETRI_PLACES=184, PETRI_TRANSITIONS=207} [2024-06-27 18:04:57,374 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-27 18:04:57,375 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 207 transitions, 3656 flow [2024-06-27 18:04:57,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:04:57,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:57,375 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 18:04:57,388 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 18:04:57,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:57,587 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:57,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1084779824, now seen corresponding path program 6 times [2024-06-27 18:04:57,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:57,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566742987] [2024-06-27 18:04:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:57,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566742987] [2024-06-27 18:04:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566742987] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271527466] [2024-06-27 18:04:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:04:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:57,732 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 18:04:57,756 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 18:04:57,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 18:04:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:57,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:04:57,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:57,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271527466] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:58,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:58,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:04:58,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824398417] [2024-06-27 18:04:58,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:58,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:04:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:04:58,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:04:58,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:58,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 207 transitions, 3656 flow. Second operand has 23 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 23 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 18:04:58,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:58,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:58,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:58,687 INFO L124 PetriNetUnfolderBase]: 861/1757 cut-off events. [2024-06-27 18:04:58,687 INFO L125 PetriNetUnfolderBase]: For 18803/18803 co-relation queries the response was YES. [2024-06-27 18:04:58,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10174 conditions, 1757 events. 861/1757 cut-off events. For 18803/18803 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11168 event pairs, 163 based on Foata normal form. 3/1760 useless extension candidates. Maximal degree in co-relation 10021. Up to 978 conditions per place. [2024-06-27 18:04:58,700 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 108 selfloop transitions, 103 changer transitions 33/247 dead transitions. [2024-06-27 18:04:58,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 247 transitions, 4456 flow [2024-06-27 18:04:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:04:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:04:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-27 18:04:58,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-06-27 18:04:58,702 INFO L175 Difference]: Start difference. First operand has 184 places, 207 transitions, 3656 flow. Second operand 13 states and 147 transitions. [2024-06-27 18:04:58,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 247 transitions, 4456 flow [2024-06-27 18:04:58,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 247 transitions, 4308 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:04:58,767 INFO L231 Difference]: Finished difference. Result has 192 places, 184 transitions, 3305 flow [2024-06-27 18:04:58,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3305, PETRI_PLACES=192, PETRI_TRANSITIONS=184} [2024-06-27 18:04:58,768 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-27 18:04:58,768 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 184 transitions, 3305 flow [2024-06-27 18:04:58,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 23 states have internal predecessors, (153), 0 states have call successors, (0), 0 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 18:04:58,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:58,769 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 18:04:58,780 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 18:04:58,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:58,981 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:58,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -120843560, now seen corresponding path program 7 times [2024-06-27 18:04:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547996056] [2024-06-27 18:04:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547996056] [2024-06-27 18:04:59,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547996056] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:59,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208630438] [2024-06-27 18:04:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:04:59,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:59,102 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 18:04:59,129 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 18:04:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:59,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:04:59,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:59,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:59,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208630438] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:59,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:59,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-06-27 18:04:59,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837110270] [2024-06-27 18:04:59,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:59,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:04:59,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:04:59,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:04:59,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:04:59,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 184 transitions, 3305 flow. Second operand has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:04:59,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:59,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:04:59,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:00,237 INFO L124 PetriNetUnfolderBase]: 1313/2694 cut-off events. [2024-06-27 18:05:00,238 INFO L125 PetriNetUnfolderBase]: For 30477/30477 co-relation queries the response was YES. [2024-06-27 18:05:00,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15649 conditions, 2694 events. 1313/2694 cut-off events. For 30477/30477 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 19154 event pairs, 104 based on Foata normal form. 32/2726 useless extension candidates. Maximal degree in co-relation 15555. Up to 719 conditions per place. [2024-06-27 18:05:00,255 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 114 selfloop transitions, 224 changer transitions 50/391 dead transitions. [2024-06-27 18:05:00,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 7620 flow [2024-06-27 18:05:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:05:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:05:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 247 transitions. [2024-06-27 18:05:00,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158249158249158 [2024-06-27 18:05:00,256 INFO L175 Difference]: Start difference. First operand has 192 places, 184 transitions, 3305 flow. Second operand 22 states and 247 transitions. [2024-06-27 18:05:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 7620 flow [2024-06-27 18:05:00,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 391 transitions, 7245 flow, removed 30 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:00,357 INFO L231 Difference]: Finished difference. Result has 206 places, 287 transitions, 5877 flow [2024-06-27 18:05:00,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5877, PETRI_PLACES=206, PETRI_TRANSITIONS=287} [2024-06-27 18:05:00,359 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 177 predicate places. [2024-06-27 18:05:00,359 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 287 transitions, 5877 flow [2024-06-27 18:05:00,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:05:00,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:00,360 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 18:05:00,373 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 18:05:00,566 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,SelfDestructingSolverStorable45 [2024-06-27 18:05:00,566 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:00,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 278024442, now seen corresponding path program 8 times [2024-06-27 18:05:00,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:00,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6357028] [2024-06-27 18:05:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6357028] [2024-06-27 18:05:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6357028] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519744618] [2024-06-27 18:05:00,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:00,652 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 18:05:00,678 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 18:05:00,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:00,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:00,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:00,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:00,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519744618] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:00,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:00,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-06-27 18:05:00,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769752371] [2024-06-27 18:05:00,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:00,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:05:00,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:05:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:05:00,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:00,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 287 transitions, 5877 flow. Second operand has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:05:00,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:00,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:00,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:02,207 INFO L124 PetriNetUnfolderBase]: 1597/3228 cut-off events. [2024-06-27 18:05:02,207 INFO L125 PetriNetUnfolderBase]: For 41398/41398 co-relation queries the response was YES. [2024-06-27 18:05:02,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20346 conditions, 3228 events. 1597/3228 cut-off events. For 41398/41398 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23503 event pairs, 262 based on Foata normal form. 20/3248 useless extension candidates. Maximal degree in co-relation 20118. Up to 1425 conditions per place. [2024-06-27 18:05:02,232 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 164 selfloop transitions, 205 changer transitions 91/463 dead transitions. [2024-06-27 18:05:02,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 463 transitions, 9610 flow [2024-06-27 18:05:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 18:05:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 18:05:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 313 transitions. [2024-06-27 18:05:02,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36226851851851855 [2024-06-27 18:05:02,234 INFO L175 Difference]: Start difference. First operand has 206 places, 287 transitions, 5877 flow. Second operand 32 states and 313 transitions. [2024-06-27 18:05:02,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 463 transitions, 9610 flow [2024-06-27 18:05:02,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 463 transitions, 8857 flow, removed 242 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:02,426 INFO L231 Difference]: Finished difference. Result has 239 places, 319 transitions, 6515 flow [2024-06-27 18:05:02,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5380, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6515, PETRI_PLACES=239, PETRI_TRANSITIONS=319} [2024-06-27 18:05:02,426 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 210 predicate places. [2024-06-27 18:05:02,426 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 319 transitions, 6515 flow [2024-06-27 18:05:02,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:05:02,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:02,427 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 18:05:02,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:02,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 18:05:02,639 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:02,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1111544950, now seen corresponding path program 9 times [2024-06-27 18:05:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15429100] [2024-06-27 18:05:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15429100] [2024-06-27 18:05:02,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15429100] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871224329] [2024-06-27 18:05:02,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:05:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:02,728 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 18:05:02,732 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 18:05:02,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:05:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:02,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:02,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:02,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:03,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871224329] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:03,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:03,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-06-27 18:05:03,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008629313] [2024-06-27 18:05:03,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:03,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:05:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:03,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:05:03,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:05:03,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:03,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 319 transitions, 6515 flow. Second operand has 24 states, 24 states have (on average 6.5) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:05:03,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:03,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:04,308 INFO L124 PetriNetUnfolderBase]: 1337/2744 cut-off events. [2024-06-27 18:05:04,308 INFO L125 PetriNetUnfolderBase]: For 35306/35306 co-relation queries the response was YES. [2024-06-27 18:05:04,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17744 conditions, 2744 events. 1337/2744 cut-off events. For 35306/35306 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 19430 event pairs, 273 based on Foata normal form. 28/2772 useless extension candidates. Maximal degree in co-relation 17657. Up to 1355 conditions per place. [2024-06-27 18:05:04,332 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 202 selfloop transitions, 212 changer transitions 42/459 dead transitions. [2024-06-27 18:05:04,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 459 transitions, 9277 flow [2024-06-27 18:05:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 18:05:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 18:05:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 366 transitions. [2024-06-27 18:05:04,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765432098765432 [2024-06-27 18:05:04,334 INFO L175 Difference]: Start difference. First operand has 239 places, 319 transitions, 6515 flow. Second operand 36 states and 366 transitions. [2024-06-27 18:05:04,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 459 transitions, 9277 flow [2024-06-27 18:05:04,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 459 transitions, 8709 flow, removed 135 selfloop flow, removed 17 redundant places. [2024-06-27 18:05:04,509 INFO L231 Difference]: Finished difference. Result has 264 places, 340 transitions, 7171 flow [2024-06-27 18:05:04,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5794, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7171, PETRI_PLACES=264, PETRI_TRANSITIONS=340} [2024-06-27 18:05:04,510 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 235 predicate places. [2024-06-27 18:05:04,510 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 340 transitions, 7171 flow [2024-06-27 18:05:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.5) internal successors, (156), 24 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:05:04,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:04,511 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 18:05:04,522 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 18:05:04,722 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,SelfDestructingSolverStorable47 [2024-06-27 18:05:04,722 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:04,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:04,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1896797700, now seen corresponding path program 10 times [2024-06-27 18:05:04,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:04,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653979285] [2024-06-27 18:05:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:04,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:04,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653979285] [2024-06-27 18:05:04,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653979285] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352825732] [2024-06-27 18:05:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:05:04,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:04,809 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 18:05:04,817 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 18:05:04,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:05:04,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:04,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:04,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:04,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:05,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352825732] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:05,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:05,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:05:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518784784] [2024-06-27 18:05:05,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:05:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:05:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:05:05,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:05,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 340 transitions, 7171 flow. Second operand has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:05:05,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:05,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:05,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:05,821 INFO L124 PetriNetUnfolderBase]: 1317/2647 cut-off events. [2024-06-27 18:05:05,821 INFO L125 PetriNetUnfolderBase]: For 38539/38539 co-relation queries the response was YES. [2024-06-27 18:05:05,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17893 conditions, 2647 events. 1317/2647 cut-off events. For 38539/38539 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18069 event pairs, 134 based on Foata normal form. 5/2652 useless extension candidates. Maximal degree in co-relation 17676. Up to 904 conditions per place. [2024-06-27 18:05:05,846 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 190 selfloop transitions, 197 changer transitions 24/414 dead transitions. [2024-06-27 18:05:05,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 414 transitions, 9234 flow [2024-06-27 18:05:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:05:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:05:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 146 transitions. [2024-06-27 18:05:05,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 18:05:05,849 INFO L175 Difference]: Start difference. First operand has 264 places, 340 transitions, 7171 flow. Second operand 14 states and 146 transitions. [2024-06-27 18:05:05,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 414 transitions, 9234 flow [2024-06-27 18:05:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 414 transitions, 8839 flow, removed 127 selfloop flow, removed 11 redundant places. [2024-06-27 18:05:06,123 INFO L231 Difference]: Finished difference. Result has 262 places, 359 transitions, 7871 flow [2024-06-27 18:05:06,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6802, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7871, PETRI_PLACES=262, PETRI_TRANSITIONS=359} [2024-06-27 18:05:06,125 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 233 predicate places. [2024-06-27 18:05:06,125 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 359 transitions, 7871 flow [2024-06-27 18:05:06,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 18:05:06,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:06,125 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 18:05:06,139 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 18:05:06,337 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,SelfDestructingSolverStorable48 [2024-06-27 18:05:06,337 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:06,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:06,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1687484030, now seen corresponding path program 11 times [2024-06-27 18:05:06,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:06,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163341793] [2024-06-27 18:05:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:06,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:06,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163341793] [2024-06-27 18:05:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163341793] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:06,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264309346] [2024-06-27 18:05:06,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:05:06,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:06,509 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 18:05:06,535 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 18:05:06,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:06,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:06,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:06,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:06,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264309346] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:06,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:06,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-06-27 18:05:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343738723] [2024-06-27 18:05:06,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:05:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:05:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:05:06,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:06,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 359 transitions, 7871 flow. Second operand has 20 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 18:05:06,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:06,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:06,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:07,574 INFO L124 PetriNetUnfolderBase]: 1344/2668 cut-off events. [2024-06-27 18:05:07,574 INFO L125 PetriNetUnfolderBase]: For 44414/44414 co-relation queries the response was YES. [2024-06-27 18:05:07,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18694 conditions, 2668 events. 1344/2668 cut-off events. For 44414/44414 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17975 event pairs, 279 based on Foata normal form. 8/2676 useless extension candidates. Maximal degree in co-relation 18486. Up to 1438 conditions per place. [2024-06-27 18:05:07,598 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 211 selfloop transitions, 149 changer transitions 65/428 dead transitions. [2024-06-27 18:05:07,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 428 transitions, 9836 flow [2024-06-27 18:05:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2024-06-27 18:05:07,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 18:05:07,600 INFO L175 Difference]: Start difference. First operand has 262 places, 359 transitions, 7871 flow. Second operand 16 states and 160 transitions. [2024-06-27 18:05:07,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 428 transitions, 9836 flow [2024-06-27 18:05:07,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 428 transitions, 9660 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:07,855 INFO L231 Difference]: Finished difference. Result has 271 places, 333 transitions, 7470 flow [2024-06-27 18:05:07,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7470, PETRI_PLACES=271, PETRI_TRANSITIONS=333} [2024-06-27 18:05:07,856 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 242 predicate places. [2024-06-27 18:05:07,856 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 333 transitions, 7470 flow [2024-06-27 18:05:07,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 18:05:07,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:07,857 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 18:05:07,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-06-27 18:05:08,068 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,SelfDestructingSolverStorable49 [2024-06-27 18:05:08,068 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:08,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1546687602, now seen corresponding path program 12 times [2024-06-27 18:05:08,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:08,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809541485] [2024-06-27 18:05:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:08,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809541485] [2024-06-27 18:05:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809541485] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:08,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578188703] [2024-06-27 18:05:08,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:08,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:08,261 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 18:05:08,290 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 18:05:08,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 18:05:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:08,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:08,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:08,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:08,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578188703] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:08,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:08,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-06-27 18:05:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446933526] [2024-06-27 18:05:08,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:08,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:05:08,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:05:08,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:05:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:08,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 333 transitions, 7470 flow. Second operand has 22 states, 22 states have (on average 6.454545454545454) internal successors, (142), 22 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:05:08,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:08,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:09,609 INFO L124 PetriNetUnfolderBase]: 1170/2410 cut-off events. [2024-06-27 18:05:09,610 INFO L125 PetriNetUnfolderBase]: For 38602/38602 co-relation queries the response was YES. [2024-06-27 18:05:09,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17138 conditions, 2410 events. 1170/2410 cut-off events. For 38602/38602 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16532 event pairs, 260 based on Foata normal form. 5/2415 useless extension candidates. Maximal degree in co-relation 17059. Up to 1473 conditions per place. [2024-06-27 18:05:09,634 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 232 selfloop transitions, 154 changer transitions 17/406 dead transitions. [2024-06-27 18:05:09,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 406 transitions, 9342 flow [2024-06-27 18:05:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:05:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:05:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 215 transitions. [2024-06-27 18:05:09,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36195286195286197 [2024-06-27 18:05:09,635 INFO L175 Difference]: Start difference. First operand has 271 places, 333 transitions, 7470 flow. Second operand 22 states and 215 transitions. [2024-06-27 18:05:09,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 406 transitions, 9342 flow [2024-06-27 18:05:09,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 406 transitions, 8686 flow, removed 33 selfloop flow, removed 21 redundant places. [2024-06-27 18:05:09,808 INFO L231 Difference]: Finished difference. Result has 272 places, 351 transitions, 7610 flow [2024-06-27 18:05:09,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6865, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7610, PETRI_PLACES=272, PETRI_TRANSITIONS=351} [2024-06-27 18:05:09,809 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 243 predicate places. [2024-06-27 18:05:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 351 transitions, 7610 flow [2024-06-27 18:05:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.454545454545454) internal successors, (142), 22 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:05:09,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:09,810 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 18:05:09,821 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 18:05:10,020 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,SelfDestructingSolverStorable50 [2024-06-27 18:05:10,021 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:10,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash -52116102, now seen corresponding path program 13 times [2024-06-27 18:05:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:10,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055042969] [2024-06-27 18:05:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055042969] [2024-06-27 18:05:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055042969] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042460381] [2024-06-27 18:05:10,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:05:10,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:10,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:10,104 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 18:05:10,105 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 18:05:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:10,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:10,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:10,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042460381] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:10,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:10,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-06-27 18:05:10,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130777189] [2024-06-27 18:05:10,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:05:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:05:10,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:05:10,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:10,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 351 transitions, 7610 flow. Second operand has 21 states, 21 states have (on average 6.571428571428571) internal successors, (138), 21 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 18:05:10,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:10,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:10,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:11,648 INFO L124 PetriNetUnfolderBase]: 1735/3536 cut-off events. [2024-06-27 18:05:11,648 INFO L125 PetriNetUnfolderBase]: For 57027/57027 co-relation queries the response was YES. [2024-06-27 18:05:11,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25039 conditions, 3536 events. 1735/3536 cut-off events. For 57027/57027 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 26227 event pairs, 105 based on Foata normal form. 23/3559 useless extension candidates. Maximal degree in co-relation 24959. Up to 1064 conditions per place. [2024-06-27 18:05:11,684 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 191 selfloop transitions, 334 changer transitions 88/616 dead transitions. [2024-06-27 18:05:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 616 transitions, 13900 flow [2024-06-27 18:05:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 18:05:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 18:05:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 347 transitions. [2024-06-27 18:05:11,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894500561167228 [2024-06-27 18:05:11,686 INFO L175 Difference]: Start difference. First operand has 272 places, 351 transitions, 7610 flow. Second operand 33 states and 347 transitions. [2024-06-27 18:05:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 616 transitions, 13900 flow [2024-06-27 18:05:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 616 transitions, 13773 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:11,931 INFO L231 Difference]: Finished difference. Result has 322 places, 460 transitions, 11517 flow [2024-06-27 18:05:11,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11517, PETRI_PLACES=322, PETRI_TRANSITIONS=460} [2024-06-27 18:05:11,931 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 293 predicate places. [2024-06-27 18:05:11,932 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 460 transitions, 11517 flow [2024-06-27 18:05:11,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.571428571428571) internal successors, (138), 21 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 18:05:11,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:11,932 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 18:05:11,943 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 18:05:12,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:12,143 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:12,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -240019326, now seen corresponding path program 14 times [2024-06-27 18:05:12,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:12,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161051903] [2024-06-27 18:05:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:12,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:12,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161051903] [2024-06-27 18:05:12,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161051903] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:12,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541686402] [2024-06-27 18:05:12,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:12,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:12,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:12,233 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 18:05:12,244 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 18:05:12,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:12,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:12,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:12,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:12,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541686402] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:12,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-06-27 18:05:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183464351] [2024-06-27 18:05:12,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:05:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:05:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:05:12,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:12,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 460 transitions, 11517 flow. Second operand has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:05:12,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:12,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:12,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:13,737 INFO L124 PetriNetUnfolderBase]: 1445/2997 cut-off events. [2024-06-27 18:05:13,737 INFO L125 PetriNetUnfolderBase]: For 60191/60191 co-relation queries the response was YES. [2024-06-27 18:05:13,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23770 conditions, 2997 events. 1445/2997 cut-off events. For 60191/60191 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21753 event pairs, 86 based on Foata normal form. 6/3003 useless extension candidates. Maximal degree in co-relation 23665. Up to 1139 conditions per place. [2024-06-27 18:05:13,772 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 170 selfloop transitions, 296 changer transitions 60/529 dead transitions. [2024-06-27 18:05:13,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 529 transitions, 13652 flow [2024-06-27 18:05:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:05:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:05:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 235 transitions. [2024-06-27 18:05:13,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144620811287478 [2024-06-27 18:05:13,773 INFO L175 Difference]: Start difference. First operand has 322 places, 460 transitions, 11517 flow. Second operand 21 states and 235 transitions. [2024-06-27 18:05:13,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 529 transitions, 13652 flow [2024-06-27 18:05:14,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 529 transitions, 13053 flow, removed 235 selfloop flow, removed 15 redundant places. [2024-06-27 18:05:14,130 INFO L231 Difference]: Finished difference. Result has 316 places, 415 transitions, 10338 flow [2024-06-27 18:05:14,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10932, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10338, PETRI_PLACES=316, PETRI_TRANSITIONS=415} [2024-06-27 18:05:14,131 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2024-06-27 18:05:14,131 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 415 transitions, 10338 flow [2024-06-27 18:05:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:05:14,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:14,132 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 18:05:14,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-06-27 18:05:14,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:14,343 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:14,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1287372930, now seen corresponding path program 15 times [2024-06-27 18:05:14,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:14,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419240970] [2024-06-27 18:05:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:14,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:14,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419240970] [2024-06-27 18:05:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419240970] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:14,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258334216] [2024-06-27 18:05:14,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:05:14,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:14,454 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 18:05:14,456 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 18:05:14,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:05:14,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:14,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:14,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:14,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258334216] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:14,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:14,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:05:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712326551] [2024-06-27 18:05:14,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:05:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:05:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:05:14,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:14,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 415 transitions, 10338 flow. Second operand has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 23 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:05:14,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:14,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:14,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:15,563 INFO L124 PetriNetUnfolderBase]: 1323/2741 cut-off events. [2024-06-27 18:05:15,563 INFO L125 PetriNetUnfolderBase]: For 54566/54566 co-relation queries the response was YES. [2024-06-27 18:05:15,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21323 conditions, 2741 events. 1323/2741 cut-off events. For 54566/54566 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19494 event pairs, 88 based on Foata normal form. 9/2750 useless extension candidates. Maximal degree in co-relation 21228. Up to 703 conditions per place. [2024-06-27 18:05:15,592 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 194 selfloop transitions, 228 changer transitions 40/465 dead transitions. [2024-06-27 18:05:15,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 465 transitions, 12040 flow [2024-06-27 18:05:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-06-27 18:05:15,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37530864197530867 [2024-06-27 18:05:15,594 INFO L175 Difference]: Start difference. First operand has 316 places, 415 transitions, 10338 flow. Second operand 15 states and 152 transitions. [2024-06-27 18:05:15,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 465 transitions, 12040 flow [2024-06-27 18:05:15,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 465 transitions, 11490 flow, removed 17 selfloop flow, removed 20 redundant places. [2024-06-27 18:05:15,870 INFO L231 Difference]: Finished difference. Result has 310 places, 400 transitions, 9927 flow [2024-06-27 18:05:15,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9810, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9927, PETRI_PLACES=310, PETRI_TRANSITIONS=400} [2024-06-27 18:05:15,871 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 281 predicate places. [2024-06-27 18:05:15,871 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 400 transitions, 9927 flow [2024-06-27 18:05:15,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 23 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:05:15,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:15,871 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 18:05:15,885 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 18:05:16,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:16,082 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:16,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 678455426, now seen corresponding path program 16 times [2024-06-27 18:05:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463587221] [2024-06-27 18:05:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:16,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:16,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463587221] [2024-06-27 18:05:16,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463587221] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:16,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591763697] [2024-06-27 18:05:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:05:16,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:16,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:16,217 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 18:05:16,219 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 18:05:16,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:05:16,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:16,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:16,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:16,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:16,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591763697] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:16,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:16,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:05:16,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354363387] [2024-06-27 18:05:16,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:16,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:05:16,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:05:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:05:16,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:16,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 400 transitions, 9927 flow. Second operand has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 23 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:05:16,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:16,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:17,371 INFO L124 PetriNetUnfolderBase]: 1198/2449 cut-off events. [2024-06-27 18:05:17,371 INFO L125 PetriNetUnfolderBase]: For 51887/51887 co-relation queries the response was YES. [2024-06-27 18:05:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19461 conditions, 2449 events. 1198/2449 cut-off events. For 51887/51887 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16639 event pairs, 88 based on Foata normal form. 6/2455 useless extension candidates. Maximal degree in co-relation 19369. Up to 746 conditions per place. [2024-06-27 18:05:17,398 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 180 selfloop transitions, 170 changer transitions 75/428 dead transitions. [2024-06-27 18:05:17,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 428 transitions, 11067 flow [2024-06-27 18:05:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2024-06-27 18:05:17,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-06-27 18:05:17,399 INFO L175 Difference]: Start difference. First operand has 310 places, 400 transitions, 9927 flow. Second operand 15 states and 147 transitions. [2024-06-27 18:05:17,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 428 transitions, 11067 flow [2024-06-27 18:05:17,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 428 transitions, 10492 flow, removed 31 selfloop flow, removed 16 redundant places. [2024-06-27 18:05:17,639 INFO L231 Difference]: Finished difference. Result has 305 places, 338 transitions, 8016 flow [2024-06-27 18:05:17,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9352, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8016, PETRI_PLACES=305, PETRI_TRANSITIONS=338} [2024-06-27 18:05:17,640 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 276 predicate places. [2024-06-27 18:05:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 338 transitions, 8016 flow [2024-06-27 18:05:17,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 23 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:05:17,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:17,640 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 18:05:17,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:17,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:17,853 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:17,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:17,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1546794660, now seen corresponding path program 17 times [2024-06-27 18:05:17,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:17,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799715230] [2024-06-27 18:05:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:17,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:17,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:17,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799715230] [2024-06-27 18:05:17,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799715230] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:17,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591560818] [2024-06-27 18:05:17,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:05:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:17,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:17,935 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 18:05:17,936 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 18:05:17,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:17,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:17,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:17,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:18,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:18,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591560818] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:18,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:18,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-06-27 18:05:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544395774] [2024-06-27 18:05:18,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:18,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:05:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:05:18,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:05:18,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:18,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 338 transitions, 8016 flow. Second operand has 20 states, 20 states have (on average 6.75) internal successors, (135), 20 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 18:05:18,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:18,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:18,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:18,852 INFO L124 PetriNetUnfolderBase]: 1190/2446 cut-off events. [2024-06-27 18:05:18,852 INFO L125 PetriNetUnfolderBase]: For 50807/50807 co-relation queries the response was YES. [2024-06-27 18:05:18,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18324 conditions, 2446 events. 1190/2446 cut-off events. For 50807/50807 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16727 event pairs, 216 based on Foata normal form. 9/2455 useless extension candidates. Maximal degree in co-relation 18237. Up to 1058 conditions per place. [2024-06-27 18:05:18,874 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 199 selfloop transitions, 128 changer transitions 71/401 dead transitions. [2024-06-27 18:05:18,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 401 transitions, 9976 flow [2024-06-27 18:05:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:05:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:05:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-27 18:05:18,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38580246913580246 [2024-06-27 18:05:18,875 INFO L175 Difference]: Start difference. First operand has 305 places, 338 transitions, 8016 flow. Second operand 12 states and 125 transitions. [2024-06-27 18:05:18,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 401 transitions, 9976 flow [2024-06-27 18:05:19,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 401 transitions, 9477 flow, removed 47 selfloop flow, removed 16 redundant places. [2024-06-27 18:05:19,058 INFO L231 Difference]: Finished difference. Result has 290 places, 310 transitions, 7200 flow [2024-06-27 18:05:19,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7579, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7200, PETRI_PLACES=290, PETRI_TRANSITIONS=310} [2024-06-27 18:05:19,059 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 261 predicate places. [2024-06-27 18:05:19,059 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 310 transitions, 7200 flow [2024-06-27 18:05:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.75) internal successors, (135), 20 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 18:05:19,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:19,059 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 18:05:19,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:19,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:19,270 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:19,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1065944100, now seen corresponding path program 18 times [2024-06-27 18:05:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:19,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825433596] [2024-06-27 18:05:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:19,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:19,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825433596] [2024-06-27 18:05:19,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825433596] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:19,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776969418] [2024-06-27 18:05:19,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:19,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:19,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:19,365 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 18:05:19,391 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 18:05:19,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 18:05:19,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:19,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:19,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:19,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776969418] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:19,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:19,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-06-27 18:05:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676939418] [2024-06-27 18:05:19,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:19,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:05:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:05:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:05:19,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:19,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 310 transitions, 7200 flow. Second operand has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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 18:05:19,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:19,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:19,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:20,824 INFO L124 PetriNetUnfolderBase]: 1257/2707 cut-off events. [2024-06-27 18:05:20,825 INFO L125 PetriNetUnfolderBase]: For 50968/50968 co-relation queries the response was YES. [2024-06-27 18:05:20,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19018 conditions, 2707 events. 1257/2707 cut-off events. For 50968/50968 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 19658 event pairs, 110 based on Foata normal form. 10/2717 useless extension candidates. Maximal degree in co-relation 18932. Up to 581 conditions per place. [2024-06-27 18:05:20,846 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 190 selfloop transitions, 188 changer transitions 88/469 dead transitions. [2024-06-27 18:05:20,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 469 transitions, 10790 flow [2024-06-27 18:05:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 18:05:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 18:05:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 238 transitions. [2024-06-27 18:05:20,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36728395061728397 [2024-06-27 18:05:20,848 INFO L175 Difference]: Start difference. First operand has 290 places, 310 transitions, 7200 flow. Second operand 24 states and 238 transitions. [2024-06-27 18:05:20,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 469 transitions, 10790 flow [2024-06-27 18:05:21,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 469 transitions, 10223 flow, removed 70 selfloop flow, removed 18 redundant places. [2024-06-27 18:05:21,050 INFO L231 Difference]: Finished difference. Result has 292 places, 327 transitions, 7821 flow [2024-06-27 18:05:21,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7821, PETRI_PLACES=292, PETRI_TRANSITIONS=327} [2024-06-27 18:05:21,051 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 263 predicate places. [2024-06-27 18:05:21,051 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 327 transitions, 7821 flow [2024-06-27 18:05:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.521739130434782) internal successors, (150), 23 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 18:05:21,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:21,052 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 18:05:21,080 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 18:05:21,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:21,263 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:21,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash -56243938, now seen corresponding path program 19 times [2024-06-27 18:05:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:21,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753572470] [2024-06-27 18:05:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:21,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753572470] [2024-06-27 18:05:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753572470] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180787073] [2024-06-27 18:05:21,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:05:21,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:21,350 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 18:05:21,376 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 18:05:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:21,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:05:21,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:21,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:21,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180787073] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:21,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:21,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-06-27 18:05:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953896126] [2024-06-27 18:05:21,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:21,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 18:05:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 18:05:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-06-27 18:05:21,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:21,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 327 transitions, 7821 flow. Second operand has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:21,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:21,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:21,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:22,366 INFO L124 PetriNetUnfolderBase]: 1002/2189 cut-off events. [2024-06-27 18:05:22,366 INFO L125 PetriNetUnfolderBase]: For 39269/39269 co-relation queries the response was YES. [2024-06-27 18:05:22,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15646 conditions, 2189 events. 1002/2189 cut-off events. For 39269/39269 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15446 event pairs, 182 based on Foata normal form. 9/2198 useless extension candidates. Maximal degree in co-relation 15564. Up to 955 conditions per place. [2024-06-27 18:05:22,387 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 226 selfloop transitions, 105 changer transitions 39/373 dead transitions. [2024-06-27 18:05:22,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 373 transitions, 9110 flow [2024-06-27 18:05:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:05:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:05:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-06-27 18:05:22,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-27 18:05:22,389 INFO L175 Difference]: Start difference. First operand has 292 places, 327 transitions, 7821 flow. Second operand 14 states and 139 transitions. [2024-06-27 18:05:22,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 373 transitions, 9110 flow [2024-06-27 18:05:22,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 373 transitions, 8110 flow, removed 83 selfloop flow, removed 28 redundant places. [2024-06-27 18:05:22,546 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 6497 flow [2024-06-27 18:05:22,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6868, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6497, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2024-06-27 18:05:22,547 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2024-06-27 18:05:22,547 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 6497 flow [2024-06-27 18:05:22,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.545454545454546) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:22,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:22,547 INFO L208 CegarLoopForPetriNet]: trace histogram [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 18:05:22,559 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 18:05:22,759 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,SelfDestructingSolverStorable57 [2024-06-27 18:05:22,759 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:22,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1233184244, now seen corresponding path program 20 times [2024-06-27 18:05:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:22,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747415429] [2024-06-27 18:05:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:22,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:22,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747415429] [2024-06-27 18:05:22,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747415429] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552781991] [2024-06-27 18:05:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:22,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:22,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:22,790 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 18:05:22,828 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 18:05:22,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:22,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:22,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:05:22,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:22,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552781991] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:22,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:22,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-06-27 18:05:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361738365] [2024-06-27 18:05:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:22,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:05:22,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 6497 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 18:05:22,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:22,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:05:22,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:23,305 INFO L124 PetriNetUnfolderBase]: 681/1633 cut-off events. [2024-06-27 18:05:23,305 INFO L125 PetriNetUnfolderBase]: For 24932/24932 co-relation queries the response was YES. [2024-06-27 18:05:23,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11374 conditions, 1633 events. 681/1633 cut-off events. For 24932/24932 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11643 event pairs, 173 based on Foata normal form. 20/1601 useless extension candidates. Maximal degree in co-relation 11308. Up to 642 conditions per place. [2024-06-27 18:05:23,318 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 163 selfloop transitions, 102 changer transitions 5/348 dead transitions. [2024-06-27 18:05:23,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 348 transitions, 7330 flow [2024-06-27 18:05:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:05:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:05:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 205 transitions. [2024-06-27 18:05:23,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-27 18:05:23,319 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 6497 flow. Second operand 14 states and 205 transitions. [2024-06-27 18:05:23,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 348 transitions, 7330 flow [2024-06-27 18:05:23,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 7076 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-27 18:05:23,478 INFO L231 Difference]: Finished difference. Result has 247 places, 302 transitions, 6452 flow [2024-06-27 18:05:23,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5818, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6452, PETRI_PLACES=247, PETRI_TRANSITIONS=302} [2024-06-27 18:05:23,479 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2024-06-27 18:05:23,479 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 302 transitions, 6452 flow [2024-06-27 18:05:23,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 18:05:23,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:23,479 INFO L208 CegarLoopForPetriNet]: trace histogram [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 18:05:23,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:23,692 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,SelfDestructingSolverStorable58 [2024-06-27 18:05:23,692 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:23,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash -675681077, now seen corresponding path program 21 times [2024-06-27 18:05:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523312927] [2024-06-27 18:05:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523312927] [2024-06-27 18:05:23,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523312927] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658203891] [2024-06-27 18:05:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:05:23,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:23,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:23,748 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 18:05:23,788 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 18:05:23,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:05:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:23,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 18:05:23,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:23,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658203891] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:24,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:24,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11] total 23 [2024-06-27 18:05:24,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66382840] [2024-06-27 18:05:24,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:05:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:05:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:05:24,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:24,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 302 transitions, 6452 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 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 18:05:24,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:24,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:24,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:24,854 INFO L124 PetriNetUnfolderBase]: 957/1999 cut-off events. [2024-06-27 18:05:24,854 INFO L125 PetriNetUnfolderBase]: For 29971/29971 co-relation queries the response was YES. [2024-06-27 18:05:24,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14089 conditions, 1999 events. 957/1999 cut-off events. For 29971/29971 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13051 event pairs, 169 based on Foata normal form. 11/2010 useless extension candidates. Maximal degree in co-relation 14022. Up to 906 conditions per place. [2024-06-27 18:05:24,874 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 215 selfloop transitions, 158 changer transitions 19/395 dead transitions. [2024-06-27 18:05:24,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 395 transitions, 8593 flow [2024-06-27 18:05:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:05:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:05:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 217 transitions. [2024-06-27 18:05:24,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3653198653198653 [2024-06-27 18:05:24,875 INFO L175 Difference]: Start difference. First operand has 247 places, 302 transitions, 6452 flow. Second operand 22 states and 217 transitions. [2024-06-27 18:05:24,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 395 transitions, 8593 flow [2024-06-27 18:05:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 395 transitions, 8193 flow, removed 125 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:24,991 INFO L231 Difference]: Finished difference. Result has 268 places, 340 transitions, 7423 flow [2024-06-27 18:05:24,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7423, PETRI_PLACES=268, PETRI_TRANSITIONS=340} [2024-06-27 18:05:24,993 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 239 predicate places. [2024-06-27 18:05:24,993 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 340 transitions, 7423 flow [2024-06-27 18:05:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 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 18:05:24,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:24,994 INFO L208 CegarLoopForPetriNet]: trace histogram [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 18:05:25,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:25,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-06-27 18:05:25,211 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:25,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -160315147, now seen corresponding path program 22 times [2024-06-27 18:05:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:25,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456957690] [2024-06-27 18:05:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:25,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456957690] [2024-06-27 18:05:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456957690] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618263850] [2024-06-27 18:05:25,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:05:25,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:25,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:25,271 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 18:05:25,299 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 18:05:25,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:05:25,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:25,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:05:25,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:25,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:25,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618263850] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:25,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:25,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-06-27 18:05:25,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855893979] [2024-06-27 18:05:25,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:25,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:25,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:25,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:05:25,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 340 transitions, 7423 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:25,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:05:25,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:25,820 INFO L124 PetriNetUnfolderBase]: 798/1801 cut-off events. [2024-06-27 18:05:25,821 INFO L125 PetriNetUnfolderBase]: For 33544/33544 co-relation queries the response was YES. [2024-06-27 18:05:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13858 conditions, 1801 events. 798/1801 cut-off events. For 33544/33544 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12454 event pairs, 254 based on Foata normal form. 16/1775 useless extension candidates. Maximal degree in co-relation 13781. Up to 797 conditions per place. [2024-06-27 18:05:25,838 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 241 selfloop transitions, 89 changer transitions 3/404 dead transitions. [2024-06-27 18:05:25,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 404 transitions, 8675 flow [2024-06-27 18:05:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:05:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:05:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 213 transitions. [2024-06-27 18:05:25,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 18:05:25,840 INFO L175 Difference]: Start difference. First operand has 268 places, 340 transitions, 7423 flow. Second operand 14 states and 213 transitions. [2024-06-27 18:05:25,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 404 transitions, 8675 flow [2024-06-27 18:05:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 404 transitions, 8409 flow, removed 67 selfloop flow, removed 12 redundant places. [2024-06-27 18:05:25,994 INFO L231 Difference]: Finished difference. Result has 268 places, 353 transitions, 7672 flow [2024-06-27 18:05:25,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6909, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7672, PETRI_PLACES=268, PETRI_TRANSITIONS=353} [2024-06-27 18:05:25,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 239 predicate places. [2024-06-27 18:05:25,995 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 353 transitions, 7672 flow [2024-06-27 18:05:25,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:25,995 INFO L208 CegarLoopForPetriNet]: trace histogram [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 18:05:26,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:26,206 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:26,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash 718044035, now seen corresponding path program 23 times [2024-06-27 18:05:26,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:26,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522826257] [2024-06-27 18:05:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:26,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:26,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522826257] [2024-06-27 18:05:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522826257] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051709425] [2024-06-27 18:05:26,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:05:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:26,265 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 18:05:26,284 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 18:05:26,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:26,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:26,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:05:26,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:26,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051709425] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:26,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:26,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-06-27 18:05:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584436537] [2024-06-27 18:05:26,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:26,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:26,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:05:26,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 353 transitions, 7672 flow. Second operand has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:26,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:26,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:05:26,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:26,777 INFO L124 PetriNetUnfolderBase]: 763/1680 cut-off events. [2024-06-27 18:05:26,777 INFO L125 PetriNetUnfolderBase]: For 33001/33001 co-relation queries the response was YES. [2024-06-27 18:05:26,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13311 conditions, 1680 events. 763/1680 cut-off events. For 33001/33001 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11123 event pairs, 261 based on Foata normal form. 17/1655 useless extension candidates. Maximal degree in co-relation 13234. Up to 870 conditions per place. [2024-06-27 18:05:26,794 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 237 selfloop transitions, 80 changer transitions 4/385 dead transitions. [2024-06-27 18:05:26,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 385 transitions, 8536 flow [2024-06-27 18:05:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:05:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:05:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 188 transitions. [2024-06-27 18:05:26,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356125356125356 [2024-06-27 18:05:26,796 INFO L175 Difference]: Start difference. First operand has 268 places, 353 transitions, 7672 flow. Second operand 13 states and 188 transitions. [2024-06-27 18:05:26,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 385 transitions, 8536 flow [2024-06-27 18:05:26,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 385 transitions, 8246 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-27 18:05:26,935 INFO L231 Difference]: Finished difference. Result has 277 places, 353 transitions, 7546 flow [2024-06-27 18:05:26,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7546, PETRI_PLACES=277, PETRI_TRANSITIONS=353} [2024-06-27 18:05:26,935 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2024-06-27 18:05:26,936 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 353 transitions, 7546 flow [2024-06-27 18:05:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:26,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:26,936 INFO L208 CegarLoopForPetriNet]: trace histogram [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 18:05:26,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-06-27 18:05:27,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:27,147 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:27,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:27,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1689838273, now seen corresponding path program 24 times [2024-06-27 18:05:27,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:27,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654128735] [2024-06-27 18:05:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:27,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:27,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654128735] [2024-06-27 18:05:27,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654128735] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801288402] [2024-06-27 18:05:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:27,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:27,177 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 18:05:27,202 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 18:05:27,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:05:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:27,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:05:27,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:27,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:27,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801288402] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:27,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:27,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-06-27 18:05:27,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732467973] [2024-06-27 18:05:27,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:27,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:27,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:27,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:27,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:05:27,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 353 transitions, 7546 flow. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 18:05:27,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:27,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:05:27,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:27,771 INFO L124 PetriNetUnfolderBase]: 791/1737 cut-off events. [2024-06-27 18:05:27,771 INFO L125 PetriNetUnfolderBase]: For 35497/35497 co-relation queries the response was YES. [2024-06-27 18:05:27,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13795 conditions, 1737 events. 791/1737 cut-off events. For 35497/35497 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11524 event pairs, 224 based on Foata normal form. 10/1705 useless extension candidates. Maximal degree in co-relation 13714. Up to 729 conditions per place. [2024-06-27 18:05:27,787 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 211 selfloop transitions, 142 changer transitions 3/412 dead transitions. [2024-06-27 18:05:27,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 412 transitions, 8870 flow [2024-06-27 18:05:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 239 transitions. [2024-06-27 18:05:27,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2024-06-27 18:05:27,789 INFO L175 Difference]: Start difference. First operand has 277 places, 353 transitions, 7546 flow. Second operand 16 states and 239 transitions. [2024-06-27 18:05:27,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 412 transitions, 8870 flow [2024-06-27 18:05:27,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 412 transitions, 8651 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:27,925 INFO L231 Difference]: Finished difference. Result has 286 places, 362 transitions, 7963 flow [2024-06-27 18:05:27,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7963, PETRI_PLACES=286, PETRI_TRANSITIONS=362} [2024-06-27 18:05:27,926 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2024-06-27 18:05:27,926 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 362 transitions, 7963 flow [2024-06-27 18:05:27,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 18:05:27,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:27,927 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] [2024-06-27 18:05:27,950 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 18:05:28,138 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,SelfDestructingSolverStorable62 [2024-06-27 18:05:28,138 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:28,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:28,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1616762801, now seen corresponding path program 25 times [2024-06-27 18:05:28,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:28,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907186621] [2024-06-27 18:05:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:28,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:28,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:28,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907186621] [2024-06-27 18:05:28,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907186621] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:28,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874288822] [2024-06-27 18:05:28,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:05:28,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:28,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:28,273 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 18:05:28,274 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 18:05:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:28,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:28,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:28,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:28,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874288822] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:28,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:28,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-06-27 18:05:28,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852649896] [2024-06-27 18:05:28,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:28,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:28,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:28,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:28,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:28,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 362 transitions, 7963 flow. Second operand has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 18:05:28,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:28,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:28,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:29,491 INFO L124 PetriNetUnfolderBase]: 1010/2062 cut-off events. [2024-06-27 18:05:29,492 INFO L125 PetriNetUnfolderBase]: For 38693/38693 co-relation queries the response was YES. [2024-06-27 18:05:29,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15887 conditions, 2062 events. 1010/2062 cut-off events. For 38693/38693 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13067 event pairs, 23 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 15803. Up to 600 conditions per place. [2024-06-27 18:05:29,511 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 248 selfloop transitions, 153 changer transitions 33/437 dead transitions. [2024-06-27 18:05:29,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 437 transitions, 9772 flow [2024-06-27 18:05:29,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:05:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:05:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 185 transitions. [2024-06-27 18:05:29,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38065843621399176 [2024-06-27 18:05:29,512 INFO L175 Difference]: Start difference. First operand has 286 places, 362 transitions, 7963 flow. Second operand 18 states and 185 transitions. [2024-06-27 18:05:29,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 437 transitions, 9772 flow [2024-06-27 18:05:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 437 transitions, 9522 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 18:05:29,728 INFO L231 Difference]: Finished difference. Result has 301 places, 359 transitions, 7957 flow [2024-06-27 18:05:29,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7721, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7957, PETRI_PLACES=301, PETRI_TRANSITIONS=359} [2024-06-27 18:05:29,729 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 272 predicate places. [2024-06-27 18:05:29,730 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 359 transitions, 7957 flow [2024-06-27 18:05:29,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 18:05:29,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:29,730 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] [2024-06-27 18:05:29,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:29,930 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,SelfDestructingSolverStorable63 [2024-06-27 18:05:29,930 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:29,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1010811611, now seen corresponding path program 26 times [2024-06-27 18:05:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:29,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600140646] [2024-06-27 18:05:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:30,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600140646] [2024-06-27 18:05:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600140646] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629386072] [2024-06-27 18:05:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:30,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:30,059 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 18:05:30,060 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 18:05:30,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:30,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-27 18:05:30,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:30,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629386072] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:30,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:30,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2024-06-27 18:05:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686569418] [2024-06-27 18:05:30,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:30,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:30,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:30,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:30,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:30,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 359 transitions, 7957 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 18:05:30,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:30,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:30,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:31,433 INFO L124 PetriNetUnfolderBase]: 1231/2442 cut-off events. [2024-06-27 18:05:31,433 INFO L125 PetriNetUnfolderBase]: For 52902/52902 co-relation queries the response was YES. [2024-06-27 18:05:31,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20447 conditions, 2442 events. 1231/2442 cut-off events. For 52902/52902 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15779 event pairs, 77 based on Foata normal form. 5/2447 useless extension candidates. Maximal degree in co-relation 20359. Up to 668 conditions per place. [2024-06-27 18:05:31,458 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 306 selfloop transitions, 207 changer transitions 46/562 dead transitions. [2024-06-27 18:05:31,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 562 transitions, 13035 flow [2024-06-27 18:05:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:05:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:05:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 207 transitions. [2024-06-27 18:05:31,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 18:05:31,459 INFO L175 Difference]: Start difference. First operand has 301 places, 359 transitions, 7957 flow. Second operand 20 states and 207 transitions. [2024-06-27 18:05:31,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 562 transitions, 13035 flow [2024-06-27 18:05:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 562 transitions, 12407 flow, removed 133 selfloop flow, removed 16 redundant places. [2024-06-27 18:05:31,676 INFO L231 Difference]: Finished difference. Result has 304 places, 433 transitions, 9957 flow [2024-06-27 18:05:31,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9957, PETRI_PLACES=304, PETRI_TRANSITIONS=433} [2024-06-27 18:05:31,677 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 275 predicate places. [2024-06-27 18:05:31,677 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 433 transitions, 9957 flow [2024-06-27 18:05:31,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 18:05:31,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:31,677 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] [2024-06-27 18:05:31,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-06-27 18:05:31,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:31,888 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:31,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1034750845, now seen corresponding path program 27 times [2024-06-27 18:05:31,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:31,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260064620] [2024-06-27 18:05:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:31,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260064620] [2024-06-27 18:05:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260064620] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763536832] [2024-06-27 18:05:31,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:05:31,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:32,021 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 18:05:32,044 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 18:05:32,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:05:32,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:32,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:32,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:32,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763536832] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:32,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:32,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-06-27 18:05:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947727657] [2024-06-27 18:05:32,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:32,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:32,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 433 transitions, 9957 flow. Second operand has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 18:05:32,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:32,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:32,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:33,287 INFO L124 PetriNetUnfolderBase]: 1251/2505 cut-off events. [2024-06-27 18:05:33,287 INFO L125 PetriNetUnfolderBase]: For 59482/59482 co-relation queries the response was YES. [2024-06-27 18:05:33,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21099 conditions, 2505 events. 1251/2505 cut-off events. For 59482/59482 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16256 event pairs, 13 based on Foata normal form. 1/2506 useless extension candidates. Maximal degree in co-relation 21010. Up to 723 conditions per place. [2024-06-27 18:05:33,317 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 314 selfloop transitions, 178 changer transitions 18/513 dead transitions. [2024-06-27 18:05:33,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 513 transitions, 12214 flow [2024-06-27 18:05:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-06-27 18:05:33,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38271604938271603 [2024-06-27 18:05:33,318 INFO L175 Difference]: Start difference. First operand has 304 places, 433 transitions, 9957 flow. Second operand 15 states and 155 transitions. [2024-06-27 18:05:33,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 513 transitions, 12214 flow [2024-06-27 18:05:33,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 513 transitions, 11858 flow, removed 73 selfloop flow, removed 11 redundant places. [2024-06-27 18:05:33,547 INFO L231 Difference]: Finished difference. Result has 303 places, 452 transitions, 10579 flow [2024-06-27 18:05:33,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9625, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10579, PETRI_PLACES=303, PETRI_TRANSITIONS=452} [2024-06-27 18:05:33,548 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 274 predicate places. [2024-06-27 18:05:33,548 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 452 transitions, 10579 flow [2024-06-27 18:05:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 18:05:33,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:33,548 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] [2024-06-27 18:05:33,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-06-27 18:05:33,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:33,759 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:33,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash 208166995, now seen corresponding path program 28 times [2024-06-27 18:05:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:33,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44107198] [2024-06-27 18:05:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:33,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44107198] [2024-06-27 18:05:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44107198] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38595698] [2024-06-27 18:05:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:05:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:33,875 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 18:05:33,875 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 18:05:33,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:05:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:33,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:33,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:34,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:34,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38595698] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:34,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-06-27 18:05:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862515650] [2024-06-27 18:05:34,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:34,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:34,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:34,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 452 transitions, 10579 flow. Second operand has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:05:34,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:34,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:34,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:35,042 INFO L124 PetriNetUnfolderBase]: 1220/2435 cut-off events. [2024-06-27 18:05:35,042 INFO L125 PetriNetUnfolderBase]: For 60511/60511 co-relation queries the response was YES. [2024-06-27 18:05:35,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20905 conditions, 2435 events. 1220/2435 cut-off events. For 60511/60511 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15737 event pairs, 13 based on Foata normal form. 10/2445 useless extension candidates. Maximal degree in co-relation 20817. Up to 721 conditions per place. [2024-06-27 18:05:35,071 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 236 selfloop transitions, 152 changer transitions 107/498 dead transitions. [2024-06-27 18:05:35,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 498 transitions, 12080 flow [2024-06-27 18:05:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 151 transitions. [2024-06-27 18:05:35,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728395061728395 [2024-06-27 18:05:35,072 INFO L175 Difference]: Start difference. First operand has 303 places, 452 transitions, 10579 flow. Second operand 15 states and 151 transitions. [2024-06-27 18:05:35,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 498 transitions, 12080 flow [2024-06-27 18:05:35,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 498 transitions, 11968 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:35,354 INFO L231 Difference]: Finished difference. Result has 306 places, 360 transitions, 8645 flow [2024-06-27 18:05:35,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10467, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8645, PETRI_PLACES=306, PETRI_TRANSITIONS=360} [2024-06-27 18:05:35,355 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 277 predicate places. [2024-06-27 18:05:35,355 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 360 transitions, 8645 flow [2024-06-27 18:05:35,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:05:35,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:35,355 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] [2024-06-27 18:05:35,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-06-27 18:05:35,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:35,566 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:35,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash 795912317, now seen corresponding path program 29 times [2024-06-27 18:05:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810043107] [2024-06-27 18:05:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:35,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:35,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810043107] [2024-06-27 18:05:35,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810043107] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646253963] [2024-06-27 18:05:35,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:05:35,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:35,671 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 18:05:35,688 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 18:05:35,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:05:35,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:35,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:35,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:05:35,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646253963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:05:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 17 [2024-06-27 18:05:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832625270] [2024-06-27 18:05:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:05:35,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:35,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 360 transitions, 8645 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:05:35,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:35,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:35,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:36,218 INFO L124 PetriNetUnfolderBase]: 885/1762 cut-off events. [2024-06-27 18:05:36,218 INFO L125 PetriNetUnfolderBase]: For 45898/45898 co-relation queries the response was YES. [2024-06-27 18:05:36,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15578 conditions, 1762 events. 885/1762 cut-off events. For 45898/45898 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10494 event pairs, 82 based on Foata normal form. 11/1773 useless extension candidates. Maximal degree in co-relation 15489. Up to 654 conditions per place. [2024-06-27 18:05:36,235 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 106 selfloop transitions, 42 changer transitions 225/376 dead transitions. [2024-06-27 18:05:36,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 376 transitions, 9485 flow [2024-06-27 18:05:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-27 18:05:36,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39094650205761317 [2024-06-27 18:05:36,236 INFO L175 Difference]: Start difference. First operand has 306 places, 360 transitions, 8645 flow. Second operand 9 states and 95 transitions. [2024-06-27 18:05:36,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 376 transitions, 9485 flow [2024-06-27 18:05:36,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 376 transitions, 8842 flow, removed 25 selfloop flow, removed 21 redundant places. [2024-06-27 18:05:36,408 INFO L231 Difference]: Finished difference. Result has 286 places, 143 transitions, 2954 flow [2024-06-27 18:05:36,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8002, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2954, PETRI_PLACES=286, PETRI_TRANSITIONS=143} [2024-06-27 18:05:36,408 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2024-06-27 18:05:36,409 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 143 transitions, 2954 flow [2024-06-27 18:05:36,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:05:36,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:36,409 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] [2024-06-27 18:05:36,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-06-27 18:05:36,620 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,SelfDestructingSolverStorable67 [2024-06-27 18:05:36,620 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:36,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash -924739663, now seen corresponding path program 30 times [2024-06-27 18:05:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925176715] [2024-06-27 18:05:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:36,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925176715] [2024-06-27 18:05:36,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925176715] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:36,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208260334] [2024-06-27 18:05:36,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:36,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:36,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:36,744 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 18:05:36,747 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 18:05:36,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:05:36,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:36,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:36,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:36,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:37,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208260334] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:37,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:37,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 28 [2024-06-27 18:05:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698004642] [2024-06-27 18:05:37,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:37,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 18:05:37,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 18:05:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2024-06-27 18:05:37,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:37,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 143 transitions, 2954 flow. Second operand has 29 states, 29 states have (on average 6.620689655172414) internal successors, (192), 29 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 18:05:37,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:37,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:37,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:38,144 INFO L124 PetriNetUnfolderBase]: 426/946 cut-off events. [2024-06-27 18:05:38,144 INFO L125 PetriNetUnfolderBase]: For 18436/18436 co-relation queries the response was YES. [2024-06-27 18:05:38,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7030 conditions, 946 events. 426/946 cut-off events. For 18436/18436 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5183 event pairs, 28 based on Foata normal form. 8/954 useless extension candidates. Maximal degree in co-relation 6948. Up to 209 conditions per place. [2024-06-27 18:05:38,153 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 117 selfloop transitions, 115 changer transitions 17/252 dead transitions. [2024-06-27 18:05:38,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 252 transitions, 4859 flow [2024-06-27 18:05:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 18:05:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 18:05:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 328 transitions. [2024-06-27 18:05:38,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374485596707819 [2024-06-27 18:05:38,155 INFO L175 Difference]: Start difference. First operand has 286 places, 143 transitions, 2954 flow. Second operand 36 states and 328 transitions. [2024-06-27 18:05:38,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 252 transitions, 4859 flow [2024-06-27 18:05:38,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 252 transitions, 3720 flow, removed 125 selfloop flow, removed 53 redundant places. [2024-06-27 18:05:38,227 INFO L231 Difference]: Finished difference. Result has 244 places, 173 transitions, 3046 flow [2024-06-27 18:05:38,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3046, PETRI_PLACES=244, PETRI_TRANSITIONS=173} [2024-06-27 18:05:38,227 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2024-06-27 18:05:38,228 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 173 transitions, 3046 flow [2024-06-27 18:05:38,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.620689655172414) internal successors, (192), 29 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 18:05:38,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:38,228 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] [2024-06-27 18:05:38,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-06-27 18:05:38,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-06-27 18:05:38,439 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:38,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1982357123, now seen corresponding path program 31 times [2024-06-27 18:05:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880592066] [2024-06-27 18:05:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:38,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:38,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880592066] [2024-06-27 18:05:38,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880592066] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:38,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638137913] [2024-06-27 18:05:38,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:05:38,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:38,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:38,558 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 18:05:38,578 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 18:05:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:38,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:38,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:38,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:38,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638137913] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:38,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:38,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2024-06-27 18:05:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696175768] [2024-06-27 18:05:38,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 18:05:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 18:05:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2024-06-27 18:05:38,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:38,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 173 transitions, 3046 flow. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 18:05:38,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:38,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:38,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:39,391 INFO L124 PetriNetUnfolderBase]: 400/893 cut-off events. [2024-06-27 18:05:39,391 INFO L125 PetriNetUnfolderBase]: For 11968/11968 co-relation queries the response was YES. [2024-06-27 18:05:39,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5790 conditions, 893 events. 400/893 cut-off events. For 11968/11968 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4833 event pairs, 128 based on Foata normal form. 1/886 useless extension candidates. Maximal degree in co-relation 5718. Up to 328 conditions per place. [2024-06-27 18:05:39,398 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 125 selfloop transitions, 66 changer transitions 16/210 dead transitions. [2024-06-27 18:05:39,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 210 transitions, 3749 flow [2024-06-27 18:05:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:05:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:05:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2024-06-27 18:05:39,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34156378600823045 [2024-06-27 18:05:39,399 INFO L175 Difference]: Start difference. First operand has 244 places, 173 transitions, 3046 flow. Second operand 18 states and 166 transitions. [2024-06-27 18:05:39,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 210 transitions, 3749 flow [2024-06-27 18:05:39,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 210 transitions, 3539 flow, removed 40 selfloop flow, removed 20 redundant places. [2024-06-27 18:05:39,435 INFO L231 Difference]: Finished difference. Result has 242 places, 168 transitions, 2881 flow [2024-06-27 18:05:39,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2844, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2881, PETRI_PLACES=242, PETRI_TRANSITIONS=168} [2024-06-27 18:05:39,436 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 213 predicate places. [2024-06-27 18:05:39,436 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 168 transitions, 2881 flow [2024-06-27 18:05:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 18:05:39,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:39,436 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] [2024-06-27 18:05:39,450 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 18:05:39,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:39,651 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:39,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1724864851, now seen corresponding path program 32 times [2024-06-27 18:05:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:39,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453421516] [2024-06-27 18:05:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453421516] [2024-06-27 18:05:39,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453421516] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:39,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214531986] [2024-06-27 18:05:39,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:39,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:39,793 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 18:05:39,794 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 18:05:39,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:39,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:39,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-27 18:05:39,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:39,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:40,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214531986] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:40,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:40,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2024-06-27 18:05:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004337533] [2024-06-27 18:05:40,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:40,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:40,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:40,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 168 transitions, 2881 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 18:05:40,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:40,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:40,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:40,780 INFO L124 PetriNetUnfolderBase]: 404/912 cut-off events. [2024-06-27 18:05:40,781 INFO L125 PetriNetUnfolderBase]: For 10940/10940 co-relation queries the response was YES. [2024-06-27 18:05:40,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5778 conditions, 912 events. 404/912 cut-off events. For 10940/10940 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5003 event pairs, 118 based on Foata normal form. 2/906 useless extension candidates. Maximal degree in co-relation 5709. Up to 297 conditions per place. [2024-06-27 18:05:40,788 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 132 selfloop transitions, 68 changer transitions 20/223 dead transitions. [2024-06-27 18:05:40,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 223 transitions, 3738 flow [2024-06-27 18:05:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:05:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:05:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 224 transitions. [2024-06-27 18:05:40,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33185185185185184 [2024-06-27 18:05:40,790 INFO L175 Difference]: Start difference. First operand has 242 places, 168 transitions, 2881 flow. Second operand 25 states and 224 transitions. [2024-06-27 18:05:40,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 223 transitions, 3738 flow [2024-06-27 18:05:40,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 223 transitions, 3638 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 18:05:40,826 INFO L231 Difference]: Finished difference. Result has 254 places, 167 transitions, 2922 flow [2024-06-27 18:05:40,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2922, PETRI_PLACES=254, PETRI_TRANSITIONS=167} [2024-06-27 18:05:40,827 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 225 predicate places. [2024-06-27 18:05:40,827 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 167 transitions, 2922 flow [2024-06-27 18:05:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 18:05:40,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:40,827 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] [2024-06-27 18:05:40,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:41,038 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,SelfDestructingSolverStorable70 [2024-06-27 18:05:41,039 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:41,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash 425165609, now seen corresponding path program 33 times [2024-06-27 18:05:41,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:41,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322303122] [2024-06-27 18:05:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:41,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322303122] [2024-06-27 18:05:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322303122] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242238611] [2024-06-27 18:05:41,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:05:41,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:41,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:41,140 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 18:05:41,161 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 18:05:41,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:05:41,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:41,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:41,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:41,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:41,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242238611] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:41,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:41,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2024-06-27 18:05:41,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224086323] [2024-06-27 18:05:41,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:41,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 18:05:41,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 18:05:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-06-27 18:05:41,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:41,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 167 transitions, 2922 flow. Second operand has 27 states, 27 states have (on average 6.444444444444445) internal successors, (174), 27 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:05:41,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:41,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:41,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:41,989 INFO L124 PetriNetUnfolderBase]: 392/874 cut-off events. [2024-06-27 18:05:41,989 INFO L125 PetriNetUnfolderBase]: For 10958/10958 co-relation queries the response was YES. [2024-06-27 18:05:41,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5718 conditions, 874 events. 392/874 cut-off events. For 10958/10958 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4642 event pairs, 72 based on Foata normal form. 2/868 useless extension candidates. Maximal degree in co-relation 5647. Up to 301 conditions per place. [2024-06-27 18:05:41,995 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 101 selfloop transitions, 42 changer transitions 55/201 dead transitions. [2024-06-27 18:05:41,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 201 transitions, 3621 flow [2024-06-27 18:05:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 145 transitions. [2024-06-27 18:05:41,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33564814814814814 [2024-06-27 18:05:41,996 INFO L175 Difference]: Start difference. First operand has 254 places, 167 transitions, 2922 flow. Second operand 16 states and 145 transitions. [2024-06-27 18:05:41,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 201 transitions, 3621 flow [2024-06-27 18:05:42,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 201 transitions, 3484 flow, removed 28 selfloop flow, removed 16 redundant places. [2024-06-27 18:05:42,029 INFO L231 Difference]: Finished difference. Result has 253 places, 137 transitions, 2282 flow [2024-06-27 18:05:42,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2282, PETRI_PLACES=253, PETRI_TRANSITIONS=137} [2024-06-27 18:05:42,030 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2024-06-27 18:05:42,030 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 137 transitions, 2282 flow [2024-06-27 18:05:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.444444444444445) internal successors, (174), 27 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:05:42,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:42,030 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] [2024-06-27 18:05:42,042 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 18:05:42,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:42,242 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:42,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash -674008153, now seen corresponding path program 34 times [2024-06-27 18:05:42,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670983741] [2024-06-27 18:05:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:42,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:42,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670983741] [2024-06-27 18:05:42,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670983741] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170928059] [2024-06-27 18:05:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:05:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:42,360 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 18:05:42,384 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 18:05:42,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:05:42,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:42,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:42,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:42,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:42,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170928059] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:42,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:42,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-06-27 18:05:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963453778] [2024-06-27 18:05:42,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:42,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:42,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:42,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 137 transitions, 2282 flow. Second operand has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:05:42,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:42,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:42,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:43,146 INFO L124 PetriNetUnfolderBase]: 304/698 cut-off events. [2024-06-27 18:05:43,146 INFO L125 PetriNetUnfolderBase]: For 9043/9043 co-relation queries the response was YES. [2024-06-27 18:05:43,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 698 events. 304/698 cut-off events. For 9043/9043 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3527 event pairs, 17 based on Foata normal form. 1/691 useless extension candidates. Maximal degree in co-relation 4311. Up to 155 conditions per place. [2024-06-27 18:05:43,152 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 88 selfloop transitions, 69 changer transitions 10/170 dead transitions. [2024-06-27 18:05:43,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 170 transitions, 2812 flow [2024-06-27 18:05:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 145 transitions. [2024-06-27 18:05:43,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35802469135802467 [2024-06-27 18:05:43,153 INFO L175 Difference]: Start difference. First operand has 253 places, 137 transitions, 2282 flow. Second operand 15 states and 145 transitions. [2024-06-27 18:05:43,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 170 transitions, 2812 flow [2024-06-27 18:05:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 170 transitions, 2573 flow, removed 15 selfloop flow, removed 24 redundant places. [2024-06-27 18:05:43,178 INFO L231 Difference]: Finished difference. Result has 227 places, 134 transitions, 2131 flow [2024-06-27 18:05:43,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2131, PETRI_PLACES=227, PETRI_TRANSITIONS=134} [2024-06-27 18:05:43,179 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 198 predicate places. [2024-06-27 18:05:43,179 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 134 transitions, 2131 flow [2024-06-27 18:05:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 18:05:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:43,179 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] [2024-06-27 18:05:43,190 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 18:05:43,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:43,391 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:43,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1282925657, now seen corresponding path program 35 times [2024-06-27 18:05:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:43,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545963699] [2024-06-27 18:05:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:43,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:43,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545963699] [2024-06-27 18:05:43,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545963699] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:43,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481122018] [2024-06-27 18:05:43,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:05:43,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:43,494 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 18:05:43,512 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 18:05:43,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:05:43,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:43,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:43,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:05:43,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:43,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481122018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:43,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:05:43,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 17 [2024-06-27 18:05:43,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399203009] [2024-06-27 18:05:43,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:43,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:05:43,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:43,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 134 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:05:43,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:43,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:43,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:43,752 INFO L124 PetriNetUnfolderBase]: 290/667 cut-off events. [2024-06-27 18:05:43,753 INFO L125 PetriNetUnfolderBase]: For 8377/8377 co-relation queries the response was YES. [2024-06-27 18:05:43,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 667 events. 290/667 cut-off events. For 8377/8377 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3301 event pairs, 83 based on Foata normal form. 1/664 useless extension candidates. Maximal degree in co-relation 4081. Up to 271 conditions per place. [2024-06-27 18:05:43,757 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 100 selfloop transitions, 32 changer transitions 14/149 dead transitions. [2024-06-27 18:05:43,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 149 transitions, 2514 flow [2024-06-27 18:05:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-27 18:05:43,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 18:05:43,758 INFO L175 Difference]: Start difference. First operand has 227 places, 134 transitions, 2131 flow. Second operand 9 states and 90 transitions. [2024-06-27 18:05:43,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 149 transitions, 2514 flow [2024-06-27 18:05:43,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 149 transitions, 2291 flow, removed 10 selfloop flow, removed 21 redundant places. [2024-06-27 18:05:43,780 INFO L231 Difference]: Finished difference. Result has 213 places, 128 transitions, 1864 flow [2024-06-27 18:05:43,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1864, PETRI_PLACES=213, PETRI_TRANSITIONS=128} [2024-06-27 18:05:43,781 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2024-06-27 18:05:43,781 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 128 transitions, 1864 flow [2024-06-27 18:05:43,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:05:43,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:43,781 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] [2024-06-27 18:05:43,792 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 18:05:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:43,993 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:43,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2097016821, now seen corresponding path program 36 times [2024-06-27 18:05:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:43,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477488388] [2024-06-27 18:05:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:44,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477488388] [2024-06-27 18:05:44,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477488388] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925685009] [2024-06-27 18:05:44,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:44,094 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 18:05:44,116 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 18:05:44,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:05:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:44,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:44,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:05:44,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:05:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925685009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:44,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:05:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 17 [2024-06-27 18:05:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365256304] [2024-06-27 18:05:44,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:44,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:05:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:44,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:05:44,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:05:44,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:44,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 128 transitions, 1864 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:05:44,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:44,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:44,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:44,340 INFO L124 PetriNetUnfolderBase]: 268/607 cut-off events. [2024-06-27 18:05:44,340 INFO L125 PetriNetUnfolderBase]: For 7002/7002 co-relation queries the response was YES. [2024-06-27 18:05:44,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3665 conditions, 607 events. 268/607 cut-off events. For 7002/7002 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2871 event pairs, 57 based on Foata normal form. 1/604 useless extension candidates. Maximal degree in co-relation 3603. Up to 191 conditions per place. [2024-06-27 18:05:44,344 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 92 selfloop transitions, 40 changer transitions 10/145 dead transitions. [2024-06-27 18:05:44,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 145 transitions, 2240 flow [2024-06-27 18:05:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-27 18:05:44,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 18:05:44,345 INFO L175 Difference]: Start difference. First operand has 213 places, 128 transitions, 1864 flow. Second operand 9 states and 90 transitions. [2024-06-27 18:05:44,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 145 transitions, 2240 flow [2024-06-27 18:05:44,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 145 transitions, 2043 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:44,362 INFO L231 Difference]: Finished difference. Result has 203 places, 125 transitions, 1715 flow [2024-06-27 18:05:44,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1715, PETRI_PLACES=203, PETRI_TRANSITIONS=125} [2024-06-27 18:05:44,363 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 174 predicate places. [2024-06-27 18:05:44,363 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 125 transitions, 1715 flow [2024-06-27 18:05:44,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:05:44,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:44,363 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] [2024-06-27 18:05:44,374 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 18:05:44,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:44,574 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:44,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:44,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1726966475, now seen corresponding path program 37 times [2024-06-27 18:05:44,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:44,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975282456] [2024-06-27 18:05:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:44,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:44,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975282456] [2024-06-27 18:05:44,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975282456] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:44,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082932980] [2024-06-27 18:05:44,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:05:44,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:44,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:44,680 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 18:05:44,703 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 18:05:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:44,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 18:05:44,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:44,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:45,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082932980] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:45,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:45,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2024-06-27 18:05:45,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104200902] [2024-06-27 18:05:45,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:45,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:05:45,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:05:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:05:45,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:45,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 125 transitions, 1715 flow. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 18:05:45,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:45,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:45,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:45,412 INFO L124 PetriNetUnfolderBase]: 254/570 cut-off events. [2024-06-27 18:05:45,413 INFO L125 PetriNetUnfolderBase]: For 6202/6202 co-relation queries the response was YES. [2024-06-27 18:05:45,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3378 conditions, 570 events. 254/570 cut-off events. For 6202/6202 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2649 event pairs, 17 based on Foata normal form. 3/573 useless extension candidates. Maximal degree in co-relation 3320. Up to 129 conditions per place. [2024-06-27 18:05:45,416 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 45 selfloop transitions, 22 changer transitions 83/153 dead transitions. [2024-06-27 18:05:45,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 153 transitions, 2169 flow [2024-06-27 18:05:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 135 transitions. [2024-06-27 18:05:45,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-27 18:05:45,417 INFO L175 Difference]: Start difference. First operand has 203 places, 125 transitions, 1715 flow. Second operand 15 states and 135 transitions. [2024-06-27 18:05:45,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 153 transitions, 2169 flow [2024-06-27 18:05:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 153 transitions, 2010 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:45,431 INFO L231 Difference]: Finished difference. Result has 202 places, 58 transitions, 706 flow [2024-06-27 18:05:45,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=706, PETRI_PLACES=202, PETRI_TRANSITIONS=58} [2024-06-27 18:05:45,432 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 173 predicate places. [2024-06-27 18:05:45,432 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 58 transitions, 706 flow [2024-06-27 18:05:45,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 18:05:45,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:45,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:45,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-27 18:05:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-06-27 18:05:45,641 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:45,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1005091918, now seen corresponding path program 38 times [2024-06-27 18:05:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488156840] [2024-06-27 18:05:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488156840] [2024-06-27 18:05:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488156840] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201797217] [2024-06-27 18:05:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:45,692 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:05:45,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 18:05:45,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:45,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:05:45,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:45,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:45,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201797217] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:45,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:45,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-06-27 18:05:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888832988] [2024-06-27 18:05:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:05:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:05:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:05:45,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-06-27 18:05:45,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 58 transitions, 706 flow. Second operand has 13 states, 13 states have (on average 11.153846153846153) internal successors, (145), 13 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:45,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:45,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-06-27 18:05:45,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:45,942 INFO L124 PetriNetUnfolderBase]: 87/224 cut-off events. [2024-06-27 18:05:45,942 INFO L125 PetriNetUnfolderBase]: For 2173/2173 co-relation queries the response was YES. [2024-06-27 18:05:45,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 224 events. 87/224 cut-off events. For 2173/2173 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 767 event pairs, 13 based on Foata normal form. 5/229 useless extension candidates. Maximal degree in co-relation 1231. Up to 142 conditions per place. [2024-06-27 18:05:45,944 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 45 selfloop transitions, 17 changer transitions 2/73 dead transitions. [2024-06-27 18:05:45,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 73 transitions, 876 flow [2024-06-27 18:05:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-27 18:05:45,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2024-06-27 18:05:45,945 INFO L175 Difference]: Start difference. First operand has 202 places, 58 transitions, 706 flow. Second operand 10 states and 136 transitions. [2024-06-27 18:05:45,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 73 transitions, 876 flow [2024-06-27 18:05:45,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 73 transitions, 641 flow, removed 21 selfloop flow, removed 42 redundant places. [2024-06-27 18:05:45,950 INFO L231 Difference]: Finished difference. Result has 114 places, 57 transitions, 499 flow [2024-06-27 18:05:45,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=499, PETRI_PLACES=114, PETRI_TRANSITIONS=57} [2024-06-27 18:05:45,951 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2024-06-27 18:05:45,951 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 57 transitions, 499 flow [2024-06-27 18:05:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.153846153846153) internal successors, (145), 13 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:45,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:45,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:45,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-06-27 18:05:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-06-27 18:05:46,152 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:46,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1213025340, now seen corresponding path program 39 times [2024-06-27 18:05:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953880535] [2024-06-27 18:05:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:46,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:46,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:46,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953880535] [2024-06-27 18:05:46,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953880535] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:46,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889733017] [2024-06-27 18:05:46,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:05:46,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:46,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:46,204 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:05:46,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 18:05:46,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:05:46,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:46,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:46,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:46,327 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 18:05:46,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 18:05:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889733017] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:46,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:46,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-06-27 18:05:46,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919960877] [2024-06-27 18:05:46,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:46,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:05:46,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:05:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:05:46,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-06-27 18:05:46,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 57 transitions, 499 flow. Second operand has 21 states, 21 states have (on average 7.428571428571429) internal successors, (156), 21 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:05:46,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:46,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-06-27 18:05:46,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:46,765 INFO L124 PetriNetUnfolderBase]: 103/245 cut-off events. [2024-06-27 18:05:46,765 INFO L125 PetriNetUnfolderBase]: For 1083/1083 co-relation queries the response was YES. [2024-06-27 18:05:46,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 245 events. 103/245 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 843 event pairs, 4 based on Foata normal form. 7/252 useless extension candidates. Maximal degree in co-relation 1062. Up to 52 conditions per place. [2024-06-27 18:05:46,766 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2024-06-27 18:05:46,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 87 transitions, 783 flow [2024-06-27 18:05:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:05:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:05:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 165 transitions. [2024-06-27 18:05:46,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2024-06-27 18:05:46,767 INFO L175 Difference]: Start difference. First operand has 114 places, 57 transitions, 499 flow. Second operand 20 states and 165 transitions. [2024-06-27 18:05:46,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 87 transitions, 783 flow [2024-06-27 18:05:46,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 87 transitions, 731 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 18:05:46,770 INFO L231 Difference]: Finished difference. Result has 121 places, 0 transitions, 0 flow [2024-06-27 18:05:46,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=0, PETRI_PLACES=121, PETRI_TRANSITIONS=0} [2024-06-27 18:05:46,770 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-27 18:05:46,771 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 0 transitions, 0 flow [2024-06-27 18:05:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.428571428571429) internal successors, (156), 21 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:05:46,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 18:05:46,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 18:05:46,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 18:05:46,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 18:05:46,774 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 18:05:46,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-06-27 18:05:46,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-06-27 18:05:46,984 INFO L445 BasicCegarLoop]: Path program histogram: [39, 20, 6, 5, 5, 1, 1, 1] [2024-06-27 18:05:46,987 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 18:05:46,987 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 18:05:46,990 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 18:05:46,990 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 18:05:46,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 06:05:46 BasicIcfg [2024-06-27 18:05:46,990 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 18:05:46,991 INFO L158 Benchmark]: Toolchain (without parser) took 67526.45ms. Allocated memory was 140.5MB in the beginning and 1.1GB in the end (delta: 977.3MB). Free memory was 111.3MB in the beginning and 886.1MB in the end (delta: -774.8MB). Peak memory consumption was 203.2MB. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 140.5MB. Free memory is still 108.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.21ms. Allocated memory is still 140.5MB. Free memory was 111.3MB in the beginning and 97.6MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.01ms. Allocated memory is still 140.5MB. Free memory was 96.7MB in the beginning and 95.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: Boogie Preprocessor took 25.07ms. Allocated memory is still 140.5MB. Free memory was 95.5MB in the beginning and 93.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: RCFGBuilder took 367.31ms. Allocated memory is still 140.5MB. Free memory was 93.4MB in the beginning and 96.1MB in the end (delta: -2.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-06-27 18:05:46,991 INFO L158 Benchmark]: TraceAbstraction took 66849.30ms. Allocated memory was 140.5MB in the beginning and 1.1GB in the end (delta: 977.3MB). Free memory was 95.3MB in the beginning and 886.1MB in the end (delta: -790.8MB). Peak memory consumption was 189.2MB. Max. memory is 16.1GB. [2024-06-27 18:05:46,992 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 140.5MB. Free memory is still 108.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.21ms. Allocated memory is still 140.5MB. Free memory was 111.3MB in the beginning and 97.6MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.01ms. Allocated memory is still 140.5MB. Free memory was 96.7MB in the beginning and 95.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.07ms. Allocated memory is still 140.5MB. Free memory was 95.5MB in the beginning and 93.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 367.31ms. Allocated memory is still 140.5MB. Free memory was 93.4MB in the beginning and 96.1MB in the end (delta: -2.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 66849.30ms. Allocated memory was 140.5MB in the beginning and 1.1GB in the end (delta: 977.3MB). Free memory was 95.3MB in the beginning and 886.1MB in the end (delta: -790.8MB). Peak memory consumption was 189.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 74]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 75]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 38 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 66.8s, OverallIterations: 78, TraceHistogramMax: 3, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 40.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5386 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5174 mSDsluCounter, 77 SdHoareTripleChecker+Invalid, 11.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 1053 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36845 IncrementalHoareTripleChecker+Invalid, 37898 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1053 mSolverCounterUnsat, 22 mSDtfsCounter, 36845 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2901 GetRequests, 1355 SyntacticMatches, 9 SemanticMatches, 1537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11813 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11517occurred in iteration=52, InterpolantAutomatonStates: 1012, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 2529 NumberOfCodeBlocks, 2528 NumberOfCodeBlocksAsserted, 158 NumberOfCheckSat, 3197 ConstructedInterpolants, 0 QuantifiedInterpolants, 17005 SizeOfPredicates, 132 NumberOfNonLiveVariables, 4265 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 154 InterpolantComputations, 43 PerfectInterpolantSequences, 111/454 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 18:05:47,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE