./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/popl20-nonblocking-cntr-alt.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/popl20-nonblocking-cntr-alt.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/popl20-nonblocking-cntr-alt.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 18:03:32,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:03:32,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:03:32,251 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:03:32,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:03:32,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:03:32,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:03:32,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:03:32,284 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:03:32,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:03:32,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:03:32,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:03:32,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:03:32,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:03:32,290 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:03:32,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:03:32,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:03:32,291 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:03:32,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:03:32,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:03:32,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:03:32,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:03:32,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:03:32,292 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:03:32,292 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:03:32,292 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:03:32,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:03:32,293 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:03:32,293 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:03:32,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:03:32,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:03:32,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:03:32,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:32,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:03:32,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:03:32,295 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:03:32,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:03:32,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:03:32,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:03:32,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:03:32,296 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:03:32,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:03:32,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:03:32,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:03:32,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:03:32,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:03:32,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:03:32,567 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:03:32,568 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:03:32,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/popl20-nonblocking-cntr-alt.wvr.yml/witness.yml [2024-06-27 18:03:32,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:03:32,662 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:03:32,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-06-27 18:03:33,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:03:33,948 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:03:33,950 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-06-27 18:03:33,956 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e99824025/3a433ae080ba466f86b7b6714511216f/FLAG34cc52f9f [2024-06-27 18:03:33,967 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e99824025/3a433ae080ba466f86b7b6714511216f [2024-06-27 18:03:33,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:03:33,968 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:03:33,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:33,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:03:33,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:03:33,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:32" (1/2) ... [2024-06-27 18:03:33,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d68a7ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:33, skipping insertion in model container [2024-06-27 18:03:33,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:32" (1/2) ... [2024-06-27 18:03:33,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@678bb136 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:33, skipping insertion in model container [2024-06-27 18:03:33,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:33" (2/2) ... [2024-06-27 18:03:33,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d68a7ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33, skipping insertion in model container [2024-06-27 18:03:33,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:33" (2/2) ... [2024-06-27 18:03:33,980 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:03:33,994 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:03:33,995 INFO L97 edCorrectnessWitness]: Location invariant before [L73-L73] ! multithreaded || 0 <= counter [2024-06-27 18:03:33,995 INFO L97 edCorrectnessWitness]: Location invariant before [L74-L74] ! multithreaded || 0 <= counter [2024-06-27 18:03:33,996 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:03:33,996 INFO L106 edCorrectnessWitness]: ghost_update [L72-L72] multithreaded = 1; [2024-06-27 18:03:34,013 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:03:34,171 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-06-27 18:03:34,193 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:34,199 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:03:34,330 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2024-06-27 18:03:34,337 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:34,350 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:03:34,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34 WrapperNode [2024-06-27 18:03:34,353 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:34,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:34,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:03:34,356 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:03:34,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,391 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 51 [2024-06-27 18:03:34,392 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:34,393 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:03:34,393 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:03:34,393 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:03:34,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,414 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,438 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 18:03:34,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,439 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:03:34,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:03:34,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:03:34,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:03:34,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (1/1) ... [2024-06-27 18:03:34,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:34,500 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 18:03:34,507 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 18:03:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:03:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:03:34,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:03:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:03:34,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:03:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:03:34,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:03:34,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:03:34,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:03:34,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:03:34,537 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 18:03:34,617 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:03:34,619 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:03:34,762 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:03:34,763 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:03:34,871 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:03:34,871 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 18:03:34,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:34 BoogieIcfgContainer [2024-06-27 18:03:34,872 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:03:34,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:03:34,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:03:34,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:03:34,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:32" (1/4) ... [2024-06-27 18:03:34,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be73bd0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:03:34, skipping insertion in model container [2024-06-27 18:03:34,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:03:33" (2/4) ... [2024-06-27 18:03:34,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be73bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:03:34, skipping insertion in model container [2024-06-27 18:03:34,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:34" (3/4) ... [2024-06-27 18:03:34,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be73bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:03:34, skipping insertion in model container [2024-06-27 18:03:34,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:34" (4/4) ... [2024-06-27 18:03:34,880 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-06-27 18:03:34,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:03:34,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:03:34,895 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:03:34,956 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:03:34,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 66 flow [2024-06-27 18:03:35,028 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2024-06-27 18:03:35,030 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:03:35,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 2/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-06-27 18:03:35,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 66 flow [2024-06-27 18:03:35,038 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2024-06-27 18:03:35,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:03:35,060 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;@7124eba2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:03:35,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:03:35,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:03:35,067 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:03:35,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:03:35,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:03:35,068 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 18:03:35,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,073 INFO L85 PathProgramCache]: Analyzing trace with hash 232539555, now seen corresponding path program 1 times [2024-06-27 18:03:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510561425] [2024-06-27 18:03:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,263 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 18:03:35,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510561425] [2024-06-27 18:03:35,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510561425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:35,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:03:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793864091] [2024-06-27 18:03:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:35,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:35,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:35,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:35,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,415 INFO L124 PetriNetUnfolderBase]: 100/201 cut-off events. [2024-06-27 18:03:35,416 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 18:03:35,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 201 events. 100/201 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 660 event pairs, 32 based on Foata normal form. 9/205 useless extension candidates. Maximal degree in co-relation 350. Up to 114 conditions per place. [2024-06-27 18:03:35,421 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-06-27 18:03:35,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 151 flow [2024-06-27 18:03:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-27 18:03:35,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2024-06-27 18:03:35,433 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 3 states and 53 transitions. [2024-06-27 18:03:35,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 151 flow [2024-06-27 18:03:35,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 35 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:35,437 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 64 flow [2024-06-27 18:03:35,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-06-27 18:03:35,441 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-06-27 18:03:35,441 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 64 flow [2024-06-27 18:03:35,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:03:35,442 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 18:03:35,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash -196026769, now seen corresponding path program 1 times [2024-06-27 18:03:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805216628] [2024-06-27 18:03:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,488 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 18:03:35,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805216628] [2024-06-27 18:03:35,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805216628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:35,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:35,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052937287] [2024-06-27 18:03:35,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:35,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:35,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:35,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:35,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,596 INFO L124 PetriNetUnfolderBase]: 111/230 cut-off events. [2024-06-27 18:03:35,597 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 18:03:35,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 230 events. 111/230 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 786 event pairs, 27 based on Foata normal form. 12/240 useless extension candidates. Maximal degree in co-relation 144. Up to 73 conditions per place. [2024-06-27 18:03:35,599 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 35 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-06-27 18:03:35,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 183 flow [2024-06-27 18:03:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-06-27 18:03:35,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-27 18:03:35,601 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 64 flow. Second operand 4 states and 68 transitions. [2024-06-27 18:03:35,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 183 flow [2024-06-27 18:03:35,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:35,602 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 72 flow [2024-06-27 18:03:35,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-06-27 18:03:35,603 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-27 18:03:35,603 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 72 flow [2024-06-27 18:03:35,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:35,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:03:35,604 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 18:03:35,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash 94513869, now seen corresponding path program 1 times [2024-06-27 18:03:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145622] [2024-06-27 18:03:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,690 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 18:03:35,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145622] [2024-06-27 18:03:35,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:35,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:35,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:35,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451223655] [2024-06-27 18:03:35,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:35,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:35,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:35,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:35,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:35,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,760 INFO L124 PetriNetUnfolderBase]: 119/251 cut-off events. [2024-06-27 18:03:35,760 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-06-27 18:03:35,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 251 events. 119/251 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 856 event pairs, 29 based on Foata normal form. 12/261 useless extension candidates. Maximal degree in co-relation 151. Up to 106 conditions per place. [2024-06-27 18:03:35,762 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 33 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2024-06-27 18:03:35,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 193 flow [2024-06-27 18:03:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-27 18:03:35,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-27 18:03:35,764 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 72 flow. Second operand 5 states and 74 transitions. [2024-06-27 18:03:35,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 193 flow [2024-06-27 18:03:35,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:35,766 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-27 18:03:35,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-06-27 18:03:35,766 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-27 18:03:35,767 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-27 18:03:35,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:03:35,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:35,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash -546099584, now seen corresponding path program 1 times [2024-06-27 18:03:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228619062] [2024-06-27 18:03:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,850 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 18:03:35,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228619062] [2024-06-27 18:03:35,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228619062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:35,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:35,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:35,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022181618] [2024-06-27 18:03:35,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:35,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-06-27 18:03:35,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-06-27 18:03:35,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,911 INFO L124 PetriNetUnfolderBase]: 122/252 cut-off events. [2024-06-27 18:03:35,911 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-06-27 18:03:35,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 252 events. 122/252 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 885 event pairs, 56 based on Foata normal form. 9/260 useless extension candidates. Maximal degree in co-relation 260. Up to 170 conditions per place. [2024-06-27 18:03:35,915 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 26 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-06-27 18:03:35,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 178 flow [2024-06-27 18:03:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-27 18:03:35,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-27 18:03:35,919 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 4 states and 62 transitions. [2024-06-27 18:03:35,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 178 flow [2024-06-27 18:03:35,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 169 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:35,924 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 98 flow [2024-06-27 18:03:35,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2024-06-27 18:03:35,925 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-06-27 18:03:35,925 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 98 flow [2024-06-27 18:03:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:03:35,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:35,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2014163556, now seen corresponding path program 1 times [2024-06-27 18:03:35,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536974240] [2024-06-27 18:03:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,988 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 18:03:35,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536974240] [2024-06-27 18:03:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536974240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:35,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780331875] [2024-06-27 18:03:35,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:35,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-06-27 18:03:35,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-06-27 18:03:35,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:36,035 INFO L124 PetriNetUnfolderBase]: 141/293 cut-off events. [2024-06-27 18:03:36,036 INFO L125 PetriNetUnfolderBase]: For 317/319 co-relation queries the response was YES. [2024-06-27 18:03:36,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 293 events. 141/293 cut-off events. For 317/319 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1083 event pairs, 76 based on Foata normal form. 14/304 useless extension candidates. Maximal degree in co-relation 355. Up to 218 conditions per place. [2024-06-27 18:03:36,038 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 27 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-06-27 18:03:36,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 209 flow [2024-06-27 18:03:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-27 18:03:36,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 18:03:36,039 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 98 flow. Second operand 4 states and 60 transitions. [2024-06-27 18:03:36,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 209 flow [2024-06-27 18:03:36,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:36,048 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 123 flow [2024-06-27 18:03:36,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-06-27 18:03:36,049 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2024-06-27 18:03:36,049 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 123 flow [2024-06-27 18:03:36,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:36,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:36,050 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 18:03:36,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:03:36,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:36,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1814965970, now seen corresponding path program 1 times [2024-06-27 18:03:36,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:36,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779290644] [2024-06-27 18:03:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:36,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779290644] [2024-06-27 18:03:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779290644] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955400335] [2024-06-27 18:03:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:36,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:36,183 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 18:03:36,184 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 18:03:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:36,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 18:03:36,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:36,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:36,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955400335] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:36,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:36,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-06-27 18:03:36,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732057491] [2024-06-27 18:03:36,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:36,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:03:36,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:03:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:03:36,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-06-27 18:03:36,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 123 flow. Second operand has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:36,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:36,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-06-27 18:03:36,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:36,608 INFO L124 PetriNetUnfolderBase]: 209/387 cut-off events. [2024-06-27 18:03:36,608 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-06-27 18:03:36,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 387 events. 209/387 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1397 event pairs, 28 based on Foata normal form. 13/399 useless extension candidates. Maximal degree in co-relation 469. Up to 174 conditions per place. [2024-06-27 18:03:36,611 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 39 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-06-27 18:03:36,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 322 flow [2024-06-27 18:03:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:03:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:03:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-27 18:03:36,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 18:03:36,612 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 123 flow. Second operand 6 states and 78 transitions. [2024-06-27 18:03:36,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 322 flow [2024-06-27 18:03:36,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:36,614 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 198 flow [2024-06-27 18:03:36,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-06-27 18:03:36,615 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-27 18:03:36,615 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 198 flow [2024-06-27 18:03:36,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:36,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:36,616 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 18:03:36,643 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 18:03:36,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 18:03:36,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:36,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -370166616, now seen corresponding path program 2 times [2024-06-27 18:03:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:36,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337989541] [2024-06-27 18:03:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:36,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:37,054 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 18:03:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:37,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337989541] [2024-06-27 18:03:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337989541] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:37,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32248278] [2024-06-27 18:03:37,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:37,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:37,056 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 18:03:37,082 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 18:03:37,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:37,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:37,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 18:03:37,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:37,273 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 18:03:37,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:37,662 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 18:03:37,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32248278] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:37,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:37,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 18:03:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614737539] [2024-06-27 18:03:37,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:37,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:03:37,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:37,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:03:37,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:03:37,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:37,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 198 flow. Second operand has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:37,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:37,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:37,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:38,407 INFO L124 PetriNetUnfolderBase]: 516/922 cut-off events. [2024-06-27 18:03:38,407 INFO L125 PetriNetUnfolderBase]: For 2292/2292 co-relation queries the response was YES. [2024-06-27 18:03:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3448 conditions, 922 events. 516/922 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4231 event pairs, 24 based on Foata normal form. 2/924 useless extension candidates. Maximal degree in co-relation 1835. Up to 298 conditions per place. [2024-06-27 18:03:38,414 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 92 selfloop transitions, 70 changer transitions 27/192 dead transitions. [2024-06-27 18:03:38,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 192 transitions, 1495 flow [2024-06-27 18:03:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 18:03:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 18:03:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 278 transitions. [2024-06-27 18:03:38,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-27 18:03:38,416 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 198 flow. Second operand 24 states and 278 transitions. [2024-06-27 18:03:38,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 192 transitions, 1495 flow [2024-06-27 18:03:38,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 192 transitions, 1492 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:38,422 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 1086 flow [2024-06-27 18:03:38,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1086, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2024-06-27 18:03:38,422 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-27 18:03:38,423 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 1086 flow [2024-06-27 18:03:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:38,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:38,423 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 18:03:38,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 18:03:38,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-06-27 18:03:38,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:38,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1962108480, now seen corresponding path program 3 times [2024-06-27 18:03:38,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:38,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263672521] [2024-06-27 18:03:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:38,843 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 18:03:38,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:38,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263672521] [2024-06-27 18:03:38,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263672521] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:38,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488283795] [2024-06-27 18:03:38,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:38,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:38,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:38,845 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 18:03:38,868 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 18:03:38,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:03:38,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:38,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 18:03:38,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:39,046 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 18:03:39,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:39,400 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 18:03:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488283795] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:39,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:39,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 18:03:39,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813849454] [2024-06-27 18:03:39,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:39,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:03:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:03:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:03:39,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:39,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 1086 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:39,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:39,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:39,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:40,333 INFO L124 PetriNetUnfolderBase]: 539/971 cut-off events. [2024-06-27 18:03:40,333 INFO L125 PetriNetUnfolderBase]: For 5389/5389 co-relation queries the response was YES. [2024-06-27 18:03:40,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5037 conditions, 971 events. 539/971 cut-off events. For 5389/5389 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4554 event pairs, 22 based on Foata normal form. 2/973 useless extension candidates. Maximal degree in co-relation 4976. Up to 332 conditions per place. [2024-06-27 18:03:40,342 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 97 selfloop transitions, 92 changer transitions 20/212 dead transitions. [2024-06-27 18:03:40,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 212 transitions, 2224 flow [2024-06-27 18:03:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 18:03:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 18:03:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 313 transitions. [2024-06-27 18:03:40,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42994505494505497 [2024-06-27 18:03:40,344 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 1086 flow. Second operand 28 states and 313 transitions. [2024-06-27 18:03:40,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 212 transitions, 2224 flow [2024-06-27 18:03:40,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 212 transitions, 2133 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 18:03:40,363 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 1616 flow [2024-06-27 18:03:40,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1616, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-06-27 18:03:40,364 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 89 predicate places. [2024-06-27 18:03:40,364 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 1616 flow [2024-06-27 18:03:40,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:40,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:40,364 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 18:03:40,390 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 18:03:40,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:40,577 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:40,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash 193224364, now seen corresponding path program 4 times [2024-06-27 18:03:40,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:40,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176767896] [2024-06-27 18:03:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:40,770 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 18:03:40,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:40,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176767896] [2024-06-27 18:03:40,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176767896] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:40,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187744047] [2024-06-27 18:03:40,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:40,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:40,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:40,772 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 18:03:40,796 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 18:03:40,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:40,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:40,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:03:40,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:40,966 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 18:03:40,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:41,314 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 18:03:41,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187744047] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:41,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:41,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-06-27 18:03:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545831050] [2024-06-27 18:03:41,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:41,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:03:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:41,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:03:41,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:03:41,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:41,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 1616 flow. Second operand has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 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 18:03:41,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:41,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:41,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:42,542 INFO L124 PetriNetUnfolderBase]: 948/1701 cut-off events. [2024-06-27 18:03:42,543 INFO L125 PetriNetUnfolderBase]: For 14641/14641 co-relation queries the response was YES. [2024-06-27 18:03:42,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10461 conditions, 1701 events. 948/1701 cut-off events. For 14641/14641 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9090 event pairs, 28 based on Foata normal form. 4/1705 useless extension candidates. Maximal degree in co-relation 10365. Up to 436 conditions per place. [2024-06-27 18:03:42,558 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 168 selfloop transitions, 198 changer transitions 18/387 dead transitions. [2024-06-27 18:03:42,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 387 transitions, 5150 flow [2024-06-27 18:03:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 18:03:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 18:03:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 437 transitions. [2024-06-27 18:03:42,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43096646942800787 [2024-06-27 18:03:42,561 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 1616 flow. Second operand 39 states and 437 transitions. [2024-06-27 18:03:42,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 387 transitions, 5150 flow [2024-06-27 18:03:42,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 387 transitions, 4836 flow, removed 72 selfloop flow, removed 16 redundant places. [2024-06-27 18:03:42,614 INFO L231 Difference]: Finished difference. Result has 154 places, 256 transitions, 3943 flow [2024-06-27 18:03:42,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3943, PETRI_PLACES=154, PETRI_TRANSITIONS=256} [2024-06-27 18:03:42,615 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 126 predicate places. [2024-06-27 18:03:42,616 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 256 transitions, 3943 flow [2024-06-27 18:03:42,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 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 18:03:42,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:42,616 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 18:03:42,645 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 18:03:42,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:42,829 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 18:03:42,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2008303428, now seen corresponding path program 5 times [2024-06-27 18:03:42,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:42,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692559330] [2024-06-27 18:03:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:42,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:43,023 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 18:03:43,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692559330] [2024-06-27 18:03:43,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692559330] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239648972] [2024-06-27 18:03:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:03:43,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:43,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:43,045 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 18:03:43,066 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 18:03:43,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:43,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:43,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:03:43,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:43,294 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 18:03:43,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:43,626 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 18:03:43,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239648972] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:43,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:43,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-06-27 18:03:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056281724] [2024-06-27 18:03:43,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:43,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:03:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:03:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:03:43,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:43,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 256 transitions, 3943 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:43,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:43,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:43,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:44,657 INFO L124 PetriNetUnfolderBase]: 1085/1918 cut-off events. [2024-06-27 18:03:44,657 INFO L125 PetriNetUnfolderBase]: For 22645/22645 co-relation queries the response was YES. [2024-06-27 18:03:44,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13696 conditions, 1918 events. 1085/1918 cut-off events. For 22645/22645 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10401 event pairs, 33 based on Foata normal form. 2/1916 useless extension candidates. Maximal degree in co-relation 13567. Up to 823 conditions per place. [2024-06-27 18:03:44,677 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 192 selfloop transitions, 212 changer transitions 23/430 dead transitions. [2024-06-27 18:03:44,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 430 transitions, 6635 flow [2024-06-27 18:03:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 18:03:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 18:03:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 379 transitions. [2024-06-27 18:03:44,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164835164835165 [2024-06-27 18:03:44,680 INFO L175 Difference]: Start difference. First operand has 154 places, 256 transitions, 3943 flow. Second operand 35 states and 379 transitions. [2024-06-27 18:03:44,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 430 transitions, 6635 flow [2024-06-27 18:03:44,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 430 transitions, 6078 flow, removed 248 selfloop flow, removed 8 redundant places. [2024-06-27 18:03:44,786 INFO L231 Difference]: Finished difference. Result has 189 places, 313 transitions, 5200 flow [2024-06-27 18:03:44,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5200, PETRI_PLACES=189, PETRI_TRANSITIONS=313} [2024-06-27 18:03:44,787 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 161 predicate places. [2024-06-27 18:03:44,787 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 313 transitions, 5200 flow [2024-06-27 18:03:44,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:44,788 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 18:03:44,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 18:03:44,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-06-27 18:03:44,999 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 18:03:45,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1660660160, now seen corresponding path program 6 times [2024-06-27 18:03:45,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:45,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323744294] [2024-06-27 18:03:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:45,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:45,179 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 18:03:45,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:45,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323744294] [2024-06-27 18:03:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323744294] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:45,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076543110] [2024-06-27 18:03:45,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:03:45,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:45,182 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 18:03:45,199 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 18:03:45,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 18:03:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:45,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 18:03:45,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:45,438 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 18:03:45,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:45,805 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 18:03:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076543110] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:45,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:45,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 18:03:45,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707144299] [2024-06-27 18:03:45,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:45,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:03:45,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:03:45,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:03:45,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 313 transitions, 5200 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:46,818 INFO L124 PetriNetUnfolderBase]: 1386/2458 cut-off events. [2024-06-27 18:03:46,818 INFO L125 PetriNetUnfolderBase]: For 33789/33789 co-relation queries the response was YES. [2024-06-27 18:03:46,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18381 conditions, 2458 events. 1386/2458 cut-off events. For 33789/33789 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14231 event pairs, 46 based on Foata normal form. 3/2461 useless extension candidates. Maximal degree in co-relation 18233. Up to 1141 conditions per place. [2024-06-27 18:03:46,855 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 211 selfloop transitions, 269 changer transitions 26/509 dead transitions. [2024-06-27 18:03:46,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 509 transitions, 8866 flow [2024-06-27 18:03:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:03:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:03:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2024-06-27 18:03:46,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 18:03:46,857 INFO L175 Difference]: Start difference. First operand has 189 places, 313 transitions, 5200 flow. Second operand 21 states and 231 transitions. [2024-06-27 18:03:46,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 509 transitions, 8866 flow [2024-06-27 18:03:46,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 509 transitions, 8570 flow, removed 83 selfloop flow, removed 12 redundant places. [2024-06-27 18:03:47,009 INFO L231 Difference]: Finished difference. Result has 206 places, 419 transitions, 7943 flow [2024-06-27 18:03:47,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7943, PETRI_PLACES=206, PETRI_TRANSITIONS=419} [2024-06-27 18:03:47,010 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 178 predicate places. [2024-06-27 18:03:47,010 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 419 transitions, 7943 flow [2024-06-27 18:03:47,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:47,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:47,011 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 18:03:47,039 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 18:03:47,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:47,240 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 18:03:47,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 718202846, now seen corresponding path program 7 times [2024-06-27 18:03:47,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:47,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89303741] [2024-06-27 18:03:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:47,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:47,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89303741] [2024-06-27 18:03:47,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89303741] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:47,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242456982] [2024-06-27 18:03:47,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:03:47,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:47,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:47,493 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 18:03:47,514 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 18:03:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:47,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:03:47,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:47,806 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 18:03:47,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:48,360 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 18:03:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242456982] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:48,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-06-27 18:03:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817711869] [2024-06-27 18:03:48,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 18:03:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 18:03:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2024-06-27 18:03:48,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 18:03:48,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 419 transitions, 7943 flow. Second operand has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 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 18:03:48,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:48,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 18:03:48,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:50,418 INFO L124 PetriNetUnfolderBase]: 2344/3915 cut-off events. [2024-06-27 18:03:50,418 INFO L125 PetriNetUnfolderBase]: For 62365/62365 co-relation queries the response was YES. [2024-06-27 18:03:50,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31179 conditions, 3915 events. 2344/3915 cut-off events. For 62365/62365 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22580 event pairs, 43 based on Foata normal form. 2/3917 useless extension candidates. Maximal degree in co-relation 31040. Up to 1834 conditions per place. [2024-06-27 18:03:50,467 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 253 selfloop transitions, 318 changer transitions 24/596 dead transitions. [2024-06-27 18:03:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 596 transitions, 11152 flow [2024-06-27 18:03:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 18:03:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 18:03:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 257 transitions. [2024-06-27 18:03:50,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35302197802197804 [2024-06-27 18:03:50,471 INFO L175 Difference]: Start difference. First operand has 206 places, 419 transitions, 7943 flow. Second operand 28 states and 257 transitions. [2024-06-27 18:03:50,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 596 transitions, 11152 flow [2024-06-27 18:03:50,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 596 transitions, 11034 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:50,928 INFO L231 Difference]: Finished difference. Result has 238 places, 488 transitions, 10331 flow [2024-06-27 18:03:50,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10331, PETRI_PLACES=238, PETRI_TRANSITIONS=488} [2024-06-27 18:03:50,929 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 210 predicate places. [2024-06-27 18:03:50,930 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 488 transitions, 10331 flow [2024-06-27 18:03:50,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 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 18:03:50,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:50,930 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 18:03:50,945 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 18:03:51,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:51,144 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 18:03:51,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 333420972, now seen corresponding path program 8 times [2024-06-27 18:03:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:51,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323445302] [2024-06-27 18:03:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:51,339 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 18:03:51,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:51,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323445302] [2024-06-27 18:03:51,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323445302] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:51,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597113863] [2024-06-27 18:03:51,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:51,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:51,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:51,342 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 18:03:51,343 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 18:03:51,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:51,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:51,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 18:03:51,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:51,644 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 18:03:51,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:52,177 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 18:03:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597113863] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:52,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-06-27 18:03:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521279811] [2024-06-27 18:03:52,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:52,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 18:03:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 18:03:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-06-27 18:03:52,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:52,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 488 transitions, 10331 flow. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:52,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:52,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:52,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:53,502 INFO L124 PetriNetUnfolderBase]: 1452/2559 cut-off events. [2024-06-27 18:03:53,502 INFO L125 PetriNetUnfolderBase]: For 51755/51755 co-relation queries the response was YES. [2024-06-27 18:03:53,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23663 conditions, 2559 events. 1452/2559 cut-off events. For 51755/51755 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14559 event pairs, 29 based on Foata normal form. 3/2562 useless extension candidates. Maximal degree in co-relation 23516. Up to 1165 conditions per place. [2024-06-27 18:03:53,529 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 255 selfloop transitions, 321 changer transitions 27/606 dead transitions. [2024-06-27 18:03:53,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 606 transitions, 13336 flow [2024-06-27 18:03:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:03:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:03:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 216 transitions. [2024-06-27 18:03:53,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43724696356275305 [2024-06-27 18:03:53,531 INFO L175 Difference]: Start difference. First operand has 238 places, 488 transitions, 10331 flow. Second operand 19 states and 216 transitions. [2024-06-27 18:03:53,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 606 transitions, 13336 flow [2024-06-27 18:03:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 606 transitions, 13061 flow, removed 121 selfloop flow, removed 7 redundant places. [2024-06-27 18:03:53,792 INFO L231 Difference]: Finished difference. Result has 258 places, 524 transitions, 12274 flow [2024-06-27 18:03:53,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10149, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12274, PETRI_PLACES=258, PETRI_TRANSITIONS=524} [2024-06-27 18:03:53,793 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 230 predicate places. [2024-06-27 18:03:53,794 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 524 transitions, 12274 flow [2024-06-27 18:03:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:53,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:53,794 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 18:03:53,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-06-27 18:03:54,005 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,SelfDestructingSolverStorable12 [2024-06-27 18:03:54,005 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 18:03:54,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:54,006 INFO L85 PathProgramCache]: Analyzing trace with hash 767770590, now seen corresponding path program 9 times [2024-06-27 18:03:54,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:54,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527356963] [2024-06-27 18:03:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:54,241 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 18:03:54,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:54,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527356963] [2024-06-27 18:03:54,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527356963] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:54,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073225845] [2024-06-27 18:03:54,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:54,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:54,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:54,243 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 18:03:54,246 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 18:03:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:03:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:54,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 18:03:54,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:54,574 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 18:03:54,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:55,181 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 18:03:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073225845] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:55,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-06-27 18:03:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438753491] [2024-06-27 18:03:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:55,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 18:03:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 18:03:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2024-06-27 18:03:55,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 18:03:55,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 524 transitions, 12274 flow. Second operand has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 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 18:03:55,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:55,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 18:03:55,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:57,482 INFO L124 PetriNetUnfolderBase]: 2386/3983 cut-off events. [2024-06-27 18:03:57,482 INFO L125 PetriNetUnfolderBase]: For 90456/90456 co-relation queries the response was YES. [2024-06-27 18:03:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38086 conditions, 3983 events. 2386/3983 cut-off events. For 90456/90456 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22772 event pairs, 34 based on Foata normal form. 2/3985 useless extension candidates. Maximal degree in co-relation 37917. Up to 1770 conditions per place. [2024-06-27 18:03:57,542 INFO L140 encePairwiseOnDemand]: 13/26 looper letters, 295 selfloop transitions, 380 changer transitions 33/709 dead transitions. [2024-06-27 18:03:57,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 709 transitions, 15865 flow [2024-06-27 18:03:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 18:03:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 18:03:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 317 transitions. [2024-06-27 18:03:57,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585972850678733 [2024-06-27 18:03:57,544 INFO L175 Difference]: Start difference. First operand has 258 places, 524 transitions, 12274 flow. Second operand 34 states and 317 transitions. [2024-06-27 18:03:57,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 709 transitions, 15865 flow [2024-06-27 18:03:58,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 709 transitions, 15574 flow, removed 97 selfloop flow, removed 10 redundant places. [2024-06-27 18:03:58,288 INFO L231 Difference]: Finished difference. Result has 289 places, 582 transitions, 14760 flow [2024-06-27 18:03:58,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12052, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=14760, PETRI_PLACES=289, PETRI_TRANSITIONS=582} [2024-06-27 18:03:58,289 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 261 predicate places. [2024-06-27 18:03:58,289 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 582 transitions, 14760 flow [2024-06-27 18:03:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.866666666666666) internal successors, (146), 30 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 18:03:58,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:58,290 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 18:03:58,307 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 18:03:58,507 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,SelfDestructingSolverStorable13 [2024-06-27 18:03:58,508 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 18:03:58,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1405745910, now seen corresponding path program 10 times [2024-06-27 18:03:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453635994] [2024-06-27 18:03:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:58,706 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 18:03:58,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453635994] [2024-06-27 18:03:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453635994] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518613437] [2024-06-27 18:03:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:58,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:58,709 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 18:03:58,728 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 18:03:58,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:58,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 18:03:58,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:58,934 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 18:03:58,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:59,232 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 18:03:59,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518613437] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:59,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:59,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2024-06-27 18:03:59,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123947857] [2024-06-27 18:03:59,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:59,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-06-27 18:03:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-06-27 18:03:59,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2024-06-27 18:03:59,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:59,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 582 transitions, 14760 flow. Second operand has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:59,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:59,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:59,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:00,755 INFO L124 PetriNetUnfolderBase]: 1470/2576 cut-off events. [2024-06-27 18:04:00,756 INFO L125 PetriNetUnfolderBase]: For 72666/72666 co-relation queries the response was YES. [2024-06-27 18:04:00,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28091 conditions, 2576 events. 1470/2576 cut-off events. For 72666/72666 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14438 event pairs, 31 based on Foata normal form. 2/2578 useless extension candidates. Maximal degree in co-relation 27912. Up to 1436 conditions per place. [2024-06-27 18:04:00,792 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 273 selfloop transitions, 373 changer transitions 12/661 dead transitions. [2024-06-27 18:04:00,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 661 transitions, 17245 flow [2024-06-27 18:04:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 18:04:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 18:04:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 251 transitions. [2024-06-27 18:04:00,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40224358974358976 [2024-06-27 18:04:00,794 INFO L175 Difference]: Start difference. First operand has 289 places, 582 transitions, 14760 flow. Second operand 24 states and 251 transitions. [2024-06-27 18:04:00,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 661 transitions, 17245 flow [2024-06-27 18:04:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 661 transitions, 16979 flow, removed 103 selfloop flow, removed 13 redundant places. [2024-06-27 18:04:01,317 INFO L231 Difference]: Finished difference. Result has 299 places, 599 transitions, 16311 flow [2024-06-27 18:04:01,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=14496, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=16311, PETRI_PLACES=299, PETRI_TRANSITIONS=599} [2024-06-27 18:04:01,319 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 271 predicate places. [2024-06-27 18:04:01,319 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 599 transitions, 16311 flow [2024-06-27 18:04:01,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.821428571428571) internal successors, (191), 28 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:01,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:01,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:01,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 18:04:01,534 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,SelfDestructingSolverStorable14 [2024-06-27 18:04:01,534 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 18:04:01,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -557796176, now seen corresponding path program 11 times [2024-06-27 18:04:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247172506] [2024-06-27 18:04:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:01,780 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 18:04:01,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:01,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247172506] [2024-06-27 18:04:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247172506] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822983262] [2024-06-27 18:04:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:04:01,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:01,783 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 18:04:01,784 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 18:04:01,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:04:01,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:01,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:04:01,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:02,064 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 18:04:02,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:02,388 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 18:04:02,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822983262] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:02,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-06-27 18:04:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063238252] [2024-06-27 18:04:02,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:02,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 18:04:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 18:04:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 18:04:02,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:02,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 599 transitions, 16311 flow. Second operand has 36 states, 36 states have (on average 6.694444444444445) internal successors, (241), 36 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:02,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:02,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:02,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:05,567 INFO L124 PetriNetUnfolderBase]: 1684/2993 cut-off events. [2024-06-27 18:04:05,568 INFO L125 PetriNetUnfolderBase]: For 97935/97935 co-relation queries the response was YES. [2024-06-27 18:04:05,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35065 conditions, 2993 events. 1684/2993 cut-off events. For 97935/97935 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17547 event pairs, 65 based on Foata normal form. 4/2997 useless extension candidates. Maximal degree in co-relation 34865. Up to 646 conditions per place. [2024-06-27 18:04:05,612 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 310 selfloop transitions, 514 changer transitions 58/885 dead transitions. [2024-06-27 18:04:05,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 885 transitions, 23533 flow [2024-06-27 18:04:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-06-27 18:04:05,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-06-27 18:04:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 565 transitions. [2024-06-27 18:04:05,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41001451378809867 [2024-06-27 18:04:05,637 INFO L175 Difference]: Start difference. First operand has 299 places, 599 transitions, 16311 flow. Second operand 53 states and 565 transitions. [2024-06-27 18:04:05,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 885 transitions, 23533 flow [2024-06-27 18:04:06,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 885 transitions, 23434 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-27 18:04:06,333 INFO L231 Difference]: Finished difference. Result has 356 places, 708 transitions, 21493 flow [2024-06-27 18:04:06,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=16226, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=21493, PETRI_PLACES=356, PETRI_TRANSITIONS=708} [2024-06-27 18:04:06,334 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 328 predicate places. [2024-06-27 18:04:06,335 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 708 transitions, 21493 flow [2024-06-27 18:04:06,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.694444444444445) internal successors, (241), 36 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:06,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:06,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:06,350 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 18:04:06,550 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,SelfDestructingSolverStorable15 [2024-06-27 18:04:06,550 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 18:04:06,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1639705474, now seen corresponding path program 12 times [2024-06-27 18:04:06,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:06,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034257990] [2024-06-27 18:04:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:06,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:06,777 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 18:04:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034257990] [2024-06-27 18:04:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034257990] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047273637] [2024-06-27 18:04:06,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:04:06,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:06,779 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 18:04:06,781 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 18:04:06,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:04:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:06,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:04:06,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:07,128 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 18:04:07,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:07,656 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 18:04:07,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047273637] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:07,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:07,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:04:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573299701] [2024-06-27 18:04:07,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:04:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:07,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:04:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:04:07,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:07,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 708 transitions, 21493 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:07,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:07,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:07,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:13,513 INFO L124 PetriNetUnfolderBase]: 2563/4549 cut-off events. [2024-06-27 18:04:13,513 INFO L125 PetriNetUnfolderBase]: For 192684/192684 co-relation queries the response was YES. [2024-06-27 18:04:13,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59200 conditions, 4549 events. 2563/4549 cut-off events. For 192684/192684 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28497 event pairs, 46 based on Foata normal form. 6/4555 useless extension candidates. Maximal degree in co-relation 59081. Up to 1131 conditions per place. [2024-06-27 18:04:13,591 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 435 selfloop transitions, 892 changer transitions 34/1364 dead transitions. [2024-06-27 18:04:13,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1364 transitions, 40254 flow [2024-06-27 18:04:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-06-27 18:04:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-06-27 18:04:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 1132 transitions. [2024-06-27 18:04:13,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38529611980939416 [2024-06-27 18:04:13,595 INFO L175 Difference]: Start difference. First operand has 356 places, 708 transitions, 21493 flow. Second operand 113 states and 1132 transitions. [2024-06-27 18:04:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1364 transitions, 40254 flow [2024-06-27 18:04:15,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1364 transitions, 38780 flow, removed 470 selfloop flow, removed 19 redundant places. [2024-06-27 18:04:15,284 INFO L231 Difference]: Finished difference. Result has 455 places, 1106 transitions, 35922 flow [2024-06-27 18:04:15,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=20839, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=35922, PETRI_PLACES=455, PETRI_TRANSITIONS=1106} [2024-06-27 18:04:15,286 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 427 predicate places. [2024-06-27 18:04:15,286 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 1106 transitions, 35922 flow [2024-06-27 18:04:15,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:15,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:15,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:15,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:15,496 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,SelfDestructingSolverStorable16 [2024-06-27 18:04:15,496 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 18:04:15,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash 275804170, now seen corresponding path program 13 times [2024-06-27 18:04:15,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:15,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371040858] [2024-06-27 18:04:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:15,687 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 18:04:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371040858] [2024-06-27 18:04:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371040858] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136997796] [2024-06-27 18:04:15,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:04:15,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:15,690 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 18:04:15,711 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 18:04:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:15,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:04:15,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:16,030 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 18:04:16,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:16,642 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 18:04:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136997796] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:16,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:04:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57693367] [2024-06-27 18:04:16,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:16,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:04:16,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:16,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:04:16,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:04:16,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:16,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1106 transitions, 35922 flow. Second operand has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:16,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:16,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:16,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:21,607 INFO L124 PetriNetUnfolderBase]: 2558/4556 cut-off events. [2024-06-27 18:04:21,609 INFO L125 PetriNetUnfolderBase]: For 206713/206713 co-relation queries the response was YES. [2024-06-27 18:04:21,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61303 conditions, 4556 events. 2558/4556 cut-off events. For 206713/206713 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28701 event pairs, 58 based on Foata normal form. 5/4561 useless extension candidates. Maximal degree in co-relation 60910. Up to 1321 conditions per place. [2024-06-27 18:04:21,675 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 426 selfloop transitions, 852 changer transitions 29/1310 dead transitions. [2024-06-27 18:04:21,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1310 transitions, 40955 flow [2024-06-27 18:04:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-06-27 18:04:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-06-27 18:04:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 818 transitions. [2024-06-27 18:04:21,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39824732229795523 [2024-06-27 18:04:21,701 INFO L175 Difference]: Start difference. First operand has 455 places, 1106 transitions, 35922 flow. Second operand 79 states and 818 transitions. [2024-06-27 18:04:21,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1310 transitions, 40955 flow [2024-06-27 18:04:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1310 transitions, 39575 flow, removed 366 selfloop flow, removed 26 redundant places. [2024-06-27 18:04:23,734 INFO L231 Difference]: Finished difference. Result has 514 places, 1113 transitions, 36886 flow [2024-06-27 18:04:23,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34663, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=844, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=36886, PETRI_PLACES=514, PETRI_TRANSITIONS=1113} [2024-06-27 18:04:23,736 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 486 predicate places. [2024-06-27 18:04:23,736 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1113 transitions, 36886 flow [2024-06-27 18:04:23,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:23,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:23,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:23,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 18:04:23,965 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,SelfDestructingSolverStorable17 [2024-06-27 18:04:23,966 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 18:04:23,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash -18856058, now seen corresponding path program 14 times [2024-06-27 18:04:23,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:23,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443852804] [2024-06-27 18:04:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:24,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443852804] [2024-06-27 18:04:24,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443852804] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752911173] [2024-06-27 18:04:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:04:24,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:24,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:24,222 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 18:04:24,229 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 18:04:24,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:04:24,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:24,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:04:24,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:24,546 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 18:04:24,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:25,097 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 18:04:25,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752911173] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:25,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:04:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111849987] [2024-06-27 18:04:25,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:25,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:04:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:04:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:04:25,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:25,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1113 transitions, 36886 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:25,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:25,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:25,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:31,203 INFO L124 PetriNetUnfolderBase]: 3054/5415 cut-off events. [2024-06-27 18:04:31,204 INFO L125 PetriNetUnfolderBase]: For 268874/268874 co-relation queries the response was YES. [2024-06-27 18:04:31,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75443 conditions, 5415 events. 3054/5415 cut-off events. For 268874/268874 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35353 event pairs, 64 based on Foata normal form. 5/5420 useless extension candidates. Maximal degree in co-relation 74994. Up to 1617 conditions per place. [2024-06-27 18:04:31,296 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 517 selfloop transitions, 1056 changer transitions 18/1594 dead transitions. [2024-06-27 18:04:31,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 1594 transitions, 52094 flow [2024-06-27 18:04:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-06-27 18:04:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-06-27 18:04:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 895 transitions. [2024-06-27 18:04:31,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40026833631484793 [2024-06-27 18:04:31,299 INFO L175 Difference]: Start difference. First operand has 514 places, 1113 transitions, 36886 flow. Second operand 86 states and 895 transitions. [2024-06-27 18:04:31,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 1594 transitions, 52094 flow [2024-06-27 18:04:34,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 1594 transitions, 51165 flow, removed 41 selfloop flow, removed 52 redundant places. [2024-06-27 18:04:34,130 INFO L231 Difference]: Finished difference. Result has 573 places, 1376 transitions, 49048 flow [2024-06-27 18:04:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=36121, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=49048, PETRI_PLACES=573, PETRI_TRANSITIONS=1376} [2024-06-27 18:04:34,132 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 545 predicate places. [2024-06-27 18:04:34,132 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1376 transitions, 49048 flow [2024-06-27 18:04:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:34,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:34,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 18:04:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:34,336 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 18:04:34,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2063277592, now seen corresponding path program 15 times [2024-06-27 18:04:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838357926] [2024-06-27 18:04:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838357926] [2024-06-27 18:04:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838357926] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830640583] [2024-06-27 18:04:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:04:34,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:34,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:34,571 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 18:04:34,592 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 18:04:34,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:04:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:34,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:04:34,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:35,010 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 18:04:35,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:35,598 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 18:04:35,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830640583] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:35,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:35,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:04:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317283789] [2024-06-27 18:04:35,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:35,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:04:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:04:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:04:35,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:35,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1376 transitions, 49048 flow. Second operand has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:35,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:35,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:35,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:42,051 INFO L124 PetriNetUnfolderBase]: 3444/6108 cut-off events. [2024-06-27 18:04:42,052 INFO L125 PetriNetUnfolderBase]: For 362922/362922 co-relation queries the response was YES. [2024-06-27 18:04:42,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91636 conditions, 6108 events. 3444/6108 cut-off events. For 362922/362922 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41086 event pairs, 72 based on Foata normal form. 4/6112 useless extension candidates. Maximal degree in co-relation 91190. Up to 2673 conditions per place. [2024-06-27 18:04:42,181 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 651 selfloop transitions, 1053 changer transitions 24/1731 dead transitions. [2024-06-27 18:04:42,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 1731 transitions, 61732 flow [2024-06-27 18:04:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-06-27 18:04:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-06-27 18:04:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 713 transitions. [2024-06-27 18:04:42,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39175824175824175 [2024-06-27 18:04:42,183 INFO L175 Difference]: Start difference. First operand has 573 places, 1376 transitions, 49048 flow. Second operand 70 states and 713 transitions. [2024-06-27 18:04:42,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 1731 transitions, 61732 flow [2024-06-27 18:04:48,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1731 transitions, 60739 flow, removed 344 selfloop flow, removed 18 redundant places. [2024-06-27 18:04:48,116 INFO L231 Difference]: Finished difference. Result has 655 places, 1556 transitions, 59249 flow [2024-06-27 18:04:48,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=48206, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=59249, PETRI_PLACES=655, PETRI_TRANSITIONS=1556} [2024-06-27 18:04:48,118 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 627 predicate places. [2024-06-27 18:04:48,118 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 1556 transitions, 59249 flow [2024-06-27 18:04:48,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:48,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:48,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:48,334 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 18:04:48,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 788007460, now seen corresponding path program 16 times [2024-06-27 18:04:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515296638] [2024-06-27 18:04:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,578 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 18:04:48,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515296638] [2024-06-27 18:04:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515296638] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796418945] [2024-06-27 18:04:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:04:48,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:48,581 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 18:04:48,598 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 18:04:48,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:04:48,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:48,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:04:48,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:48,944 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 18:04:48,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:49,469 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 18:04:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796418945] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:49,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:49,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:04:49,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272023409] [2024-06-27 18:04:49,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:04:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:04:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:04:49,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:49,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 1556 transitions, 59249 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:49,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:49,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:56,397 INFO L124 PetriNetUnfolderBase]: 3449/6129 cut-off events. [2024-06-27 18:04:56,398 INFO L125 PetriNetUnfolderBase]: For 403887/403887 co-relation queries the response was YES. [2024-06-27 18:04:56,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96298 conditions, 6129 events. 3449/6129 cut-off events. For 403887/403887 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 41356 event pairs, 98 based on Foata normal form. 2/6131 useless extension candidates. Maximal degree in co-relation 95818. Up to 3152 conditions per place. [2024-06-27 18:04:56,546 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 609 selfloop transitions, 1082 changer transitions 12/1706 dead transitions. [2024-06-27 18:04:56,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 701 places, 1706 transitions, 64989 flow [2024-06-27 18:04:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-06-27 18:04:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-06-27 18:04:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 520 transitions. [2024-06-27 18:04:56,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39215686274509803 [2024-06-27 18:04:56,549 INFO L175 Difference]: Start difference. First operand has 655 places, 1556 transitions, 59249 flow. Second operand 51 states and 520 transitions. [2024-06-27 18:04:56,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 701 places, 1706 transitions, 64989 flow [2024-06-27 18:05:02,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 1706 transitions, 64265 flow, removed 51 selfloop flow, removed 23 redundant places. [2024-06-27 18:05:02,591 INFO L231 Difference]: Finished difference. Result has 689 places, 1578 transitions, 63068 flow [2024-06-27 18:05:02,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=58547, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=63068, PETRI_PLACES=689, PETRI_TRANSITIONS=1578} [2024-06-27 18:05:02,594 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 661 predicate places. [2024-06-27 18:05:02,594 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1578 transitions, 63068 flow [2024-06-27 18:05:02,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:02,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:02,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:02,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 18:05:02,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:02,833 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 18:05:02,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1777912502, now seen corresponding path program 17 times [2024-06-27 18:05:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:02,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780294081] [2024-06-27 18:05:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:02,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:03,069 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 18:05:03,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:03,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780294081] [2024-06-27 18:05:03,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780294081] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:03,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946300094] [2024-06-27 18:05:03,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:05:03,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:03,071 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 18:05:03,073 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 18:05:03,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:05:03,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:03,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:05:03,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:03,418 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 18:05:03,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:03,854 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 18:05:03,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946300094] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:03,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:03,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:05:03,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779109853] [2024-06-27 18:05:03,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:03,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:05:03,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:05:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:05:03,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:05:03,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1578 transitions, 63068 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:03,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:03,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:05:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:11,089 INFO L124 PetriNetUnfolderBase]: 3611/6419 cut-off events. [2024-06-27 18:05:11,090 INFO L125 PetriNetUnfolderBase]: For 481101/481101 co-relation queries the response was YES. [2024-06-27 18:05:11,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106636 conditions, 6419 events. 3611/6419 cut-off events. For 481101/481101 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43850 event pairs, 83 based on Foata normal form. 4/6423 useless extension candidates. Maximal degree in co-relation 106445. Up to 2951 conditions per place. [2024-06-27 18:05:11,205 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 591 selfloop transitions, 1233 changer transitions 14/1841 dead transitions. [2024-06-27 18:05:11,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 1841 transitions, 73276 flow [2024-06-27 18:05:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-06-27 18:05:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-06-27 18:05:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 751 transitions. [2024-06-27 18:05:11,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800607287449393 [2024-06-27 18:05:11,207 INFO L175 Difference]: Start difference. First operand has 689 places, 1578 transitions, 63068 flow. Second operand 76 states and 751 transitions. [2024-06-27 18:05:11,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 1841 transitions, 73276 flow [2024-06-27 18:05:18,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 1841 transitions, 72928 flow, removed 68 selfloop flow, removed 25 redundant places. [2024-06-27 18:05:18,130 INFO L231 Difference]: Finished difference. Result has 758 places, 1673 transitions, 71760 flow [2024-06-27 18:05:18,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=62754, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=71760, PETRI_PLACES=758, PETRI_TRANSITIONS=1673} [2024-06-27 18:05:18,133 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 730 predicate places. [2024-06-27 18:05:18,133 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 1673 transitions, 71760 flow [2024-06-27 18:05:18,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:18,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:18,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:18,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-06-27 18:05:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:18,364 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 18:05:18,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1691842920, now seen corresponding path program 18 times [2024-06-27 18:05:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024203669] [2024-06-27 18:05:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:18,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:18,579 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 18:05:18,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024203669] [2024-06-27 18:05:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024203669] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901189488] [2024-06-27 18:05:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:18,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:18,582 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 18:05:18,583 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 18:05:18,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:05:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:18,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:05:18,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:18,953 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 18:05:18,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:19,500 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 18:05:19,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901189488] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:19,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:05:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156670741] [2024-06-27 18:05:19,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:05:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:05:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:05:19,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:05:19,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 1673 transitions, 71760 flow. Second operand has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:19,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:19,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:05:19,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:26,992 INFO L124 PetriNetUnfolderBase]: 3620/6434 cut-off events. [2024-06-27 18:05:26,993 INFO L125 PetriNetUnfolderBase]: For 533638/533638 co-relation queries the response was YES. [2024-06-27 18:05:27,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112704 conditions, 6434 events. 3620/6434 cut-off events. For 533638/533638 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 43906 event pairs, 94 based on Foata normal form. 4/6438 useless extension candidates. Maximal degree in co-relation 112236. Up to 2851 conditions per place. [2024-06-27 18:05:27,113 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 706 selfloop transitions, 1093 changer transitions 22/1824 dead transitions. [2024-06-27 18:05:27,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 1824 transitions, 77054 flow [2024-06-27 18:05:27,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-06-27 18:05:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-06-27 18:05:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 698 transitions. [2024-06-27 18:05:27,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38351648351648354 [2024-06-27 18:05:27,115 INFO L175 Difference]: Start difference. First operand has 758 places, 1673 transitions, 71760 flow. Second operand 70 states and 698 transitions. [2024-06-27 18:05:27,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 1824 transitions, 77054 flow [2024-06-27 18:05:34,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 782 places, 1824 transitions, 75538 flow, removed 531 selfloop flow, removed 40 redundant places. [2024-06-27 18:05:34,673 INFO L231 Difference]: Finished difference. Result has 786 places, 1672 transitions, 72673 flow [2024-06-27 18:05:34,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70264, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=72673, PETRI_PLACES=786, PETRI_TRANSITIONS=1672} [2024-06-27 18:05:34,675 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 758 predicate places. [2024-06-27 18:05:34,676 INFO L495 AbstractCegarLoop]: Abstraction has has 786 places, 1672 transitions, 72673 flow [2024-06-27 18:05:34,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:34,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:34,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:34,690 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 18:05:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:34,887 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 18:05:34,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash -253568608, now seen corresponding path program 19 times [2024-06-27 18:05:34,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:34,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965975860] [2024-06-27 18:05:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:35,088 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 18:05:35,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:35,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965975860] [2024-06-27 18:05:35,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965975860] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:35,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066732672] [2024-06-27 18:05:35,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:05:35,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:35,090 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 18:05:35,129 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 18:05:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:35,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:05:35,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:35,519 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 18:05:35,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:35,898 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 18:05:35,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066732672] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:35,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:35,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:05:35,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289562231] [2024-06-27 18:05:35,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:35,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:05:35,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:35,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:05:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:05:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:05:35,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 786 places, 1672 transitions, 72673 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:35,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:05:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:42,606 INFO L124 PetriNetUnfolderBase]: 3921/6992 cut-off events. [2024-06-27 18:05:42,607 INFO L125 PetriNetUnfolderBase]: For 521901/521901 co-relation queries the response was YES. [2024-06-27 18:05:42,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120639 conditions, 6992 events. 3921/6992 cut-off events. For 521901/521901 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 48847 event pairs, 114 based on Foata normal form. 7/6999 useless extension candidates. Maximal degree in co-relation 120174. Up to 3440 conditions per place. [2024-06-27 18:05:42,772 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 735 selfloop transitions, 1233 changer transitions 17/1988 dead transitions. [2024-06-27 18:05:42,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 1988 transitions, 84263 flow [2024-06-27 18:05:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-06-27 18:05:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-06-27 18:05:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 638 transitions. [2024-06-27 18:05:42,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38341346153846156 [2024-06-27 18:05:42,775 INFO L175 Difference]: Start difference. First operand has 786 places, 1672 transitions, 72673 flow. Second operand 64 states and 638 transitions. [2024-06-27 18:05:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 1988 transitions, 84263 flow [2024-06-27 18:05:51,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 782 places, 1988 transitions, 83461 flow, removed 41 selfloop flow, removed 62 redundant places. [2024-06-27 18:05:51,478 INFO L231 Difference]: Finished difference. Result has 805 places, 1821 transitions, 82044 flow [2024-06-27 18:05:51,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=71960, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=82044, PETRI_PLACES=805, PETRI_TRANSITIONS=1821} [2024-06-27 18:05:51,481 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 777 predicate places. [2024-06-27 18:05:51,481 INFO L495 AbstractCegarLoop]: Abstraction has has 805 places, 1821 transitions, 82044 flow [2024-06-27 18:05:51,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:51,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:51,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:51,496 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 18:05:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:51,696 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 18:05:51,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1475478726, now seen corresponding path program 20 times [2024-06-27 18:05:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880346748] [2024-06-27 18:05:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:51,953 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 18:05:51,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:51,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880346748] [2024-06-27 18:05:51,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880346748] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:51,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761815597] [2024-06-27 18:05:51,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:05:51,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:51,955 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 18:05:51,956 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 18:05:52,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:05:52,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:52,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:05:52,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:52,267 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 18:05:52,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:52,669 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 18:05:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761815597] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:52,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:52,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:05:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984469933] [2024-06-27 18:05:52,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:52,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:05:52,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:05:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:05:52,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:05:52,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1821 transitions, 82044 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:52,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:52,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:05:52,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:02,569 INFO L124 PetriNetUnfolderBase]: 4237/7580 cut-off events. [2024-06-27 18:06:02,570 INFO L125 PetriNetUnfolderBase]: For 636020/636020 co-relation queries the response was YES. [2024-06-27 18:06:02,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136503 conditions, 7580 events. 4237/7580 cut-off events. For 636020/636020 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54038 event pairs, 89 based on Foata normal form. 6/7586 useless extension candidates. Maximal degree in co-relation 136080. Up to 3155 conditions per place. [2024-06-27 18:06:02,901 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 696 selfloop transitions, 1468 changer transitions 21/2188 dead transitions. [2024-06-27 18:06:02,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 886 places, 2188 transitions, 95858 flow [2024-06-27 18:06:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-06-27 18:06:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-06-27 18:06:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 861 transitions. [2024-06-27 18:06:02,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38506261180679785 [2024-06-27 18:06:02,904 INFO L175 Difference]: Start difference. First operand has 805 places, 1821 transitions, 82044 flow. Second operand 86 states and 861 transitions. [2024-06-27 18:06:02,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 886 places, 2188 transitions, 95858 flow [2024-06-27 18:06:15,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 2188 transitions, 94986 flow, removed 348 selfloop flow, removed 20 redundant places. [2024-06-27 18:06:15,161 INFO L231 Difference]: Finished difference. Result has 891 places, 1983 transitions, 92824 flow [2024-06-27 18:06:15,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=81384, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=92824, PETRI_PLACES=891, PETRI_TRANSITIONS=1983} [2024-06-27 18:06:15,163 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 863 predicate places. [2024-06-27 18:06:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 891 places, 1983 transitions, 92824 flow [2024-06-27 18:06:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:15,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:15,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:15,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-06-27 18:06:15,379 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,SelfDestructingSolverStorable24 [2024-06-27 18:06:15,379 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 18:06:15,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:15,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1569725912, now seen corresponding path program 21 times [2024-06-27 18:06:15,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:15,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175839881] [2024-06-27 18:06:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:15,576 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 18:06:15,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:15,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175839881] [2024-06-27 18:06:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175839881] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:06:15,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009372260] [2024-06-27 18:06:15,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:06:15,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:06:15,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:06:15,579 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 18:06:15,636 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 18:06:15,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 18:06:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:06:15,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:06:15,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:06:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:06:15,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:06:16,439 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 18:06:16,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009372260] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:06:16,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:06:16,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:06:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860720679] [2024-06-27 18:06:16,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:06:16,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:06:16,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:16,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:06:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:06:16,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:06:16,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 891 places, 1983 transitions, 92824 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:16,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:16,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:06:16,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:26,064 INFO L124 PetriNetUnfolderBase]: 4233/7555 cut-off events. [2024-06-27 18:06:26,064 INFO L125 PetriNetUnfolderBase]: For 676148/676148 co-relation queries the response was YES. [2024-06-27 18:06:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142250 conditions, 7555 events. 4233/7555 cut-off events. For 676148/676148 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 53660 event pairs, 137 based on Foata normal form. 7/7562 useless extension candidates. Maximal degree in co-relation 141869. Up to 4097 conditions per place. [2024-06-27 18:06:26,268 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 806 selfloop transitions, 1286 changer transitions 13/2108 dead transitions. [2024-06-27 18:06:26,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 924 places, 2108 transitions, 99001 flow [2024-06-27 18:06:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 18:06:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 18:06:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 415 transitions. [2024-06-27 18:06:26,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40927021696252464 [2024-06-27 18:06:26,270 INFO L175 Difference]: Start difference. First operand has 891 places, 1983 transitions, 92824 flow. Second operand 39 states and 415 transitions. [2024-06-27 18:06:26,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 924 places, 2108 transitions, 99001 flow [2024-06-27 18:06:40,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 2108 transitions, 97745 flow, removed 401 selfloop flow, removed 44 redundant places. [2024-06-27 18:06:40,214 INFO L231 Difference]: Finished difference. Result has 888 places, 1987 transitions, 95820 flow [2024-06-27 18:06:40,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=91624, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=95820, PETRI_PLACES=888, PETRI_TRANSITIONS=1987} [2024-06-27 18:06:40,216 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 860 predicate places. [2024-06-27 18:06:40,217 INFO L495 AbstractCegarLoop]: Abstraction has has 888 places, 1987 transitions, 95820 flow [2024-06-27 18:06:40,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:40,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:06:40,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:06:40,230 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 18:06:40,428 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,SelfDestructingSolverStorable25 [2024-06-27 18:06:40,428 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 18:06:40,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:06:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash 650266852, now seen corresponding path program 22 times [2024-06-27 18:06:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:06:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658231053] [2024-06-27 18:06:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:06:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:06:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:06:40,674 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 18:06:40,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:06:40,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658231053] [2024-06-27 18:06:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658231053] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:06:40,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308903355] [2024-06-27 18:06:40,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:06:40,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:06:40,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:06:40,676 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 18:06:40,677 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 18:06:40,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:06:40,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:06:40,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:06:40,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:06:41,029 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 18:06:41,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:06:41,423 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 18:06:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308903355] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:06:41,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:06:41,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:06:41,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265589344] [2024-06-27 18:06:41,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:06:41,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:06:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:06:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:06:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:06:41,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:06:41,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 1987 transitions, 95820 flow. Second operand has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:06:41,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:06:41,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:06:41,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:06:51,338 INFO L124 PetriNetUnfolderBase]: 4234/7527 cut-off events. [2024-06-27 18:06:51,338 INFO L125 PetriNetUnfolderBase]: For 711557/711557 co-relation queries the response was YES. [2024-06-27 18:06:51,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145639 conditions, 7527 events. 4234/7527 cut-off events. For 711557/711557 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 53123 event pairs, 93 based on Foata normal form. 12/7539 useless extension candidates. Maximal degree in co-relation 145384. Up to 3094 conditions per place. [2024-06-27 18:06:51,545 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 757 selfloop transitions, 1374 changer transitions 34/2168 dead transitions. [2024-06-27 18:06:51,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 963 places, 2168 transitions, 102221 flow [2024-06-27 18:06:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-06-27 18:06:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-06-27 18:06:51,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 855 transitions. [2024-06-27 18:06:51,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3823792486583184 [2024-06-27 18:06:51,562 INFO L175 Difference]: Start difference. First operand has 888 places, 1987 transitions, 95820 flow. Second operand 86 states and 855 transitions. [2024-06-27 18:06:51,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 963 places, 2168 transitions, 102221 flow [2024-06-27 18:07:04,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 2168 transitions, 101366 flow, removed 72 selfloop flow, removed 33 redundant places. [2024-06-27 18:07:04,915 INFO L231 Difference]: Finished difference. Result has 936 places, 1980 transitions, 97885 flow [2024-06-27 18:07:04,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=94563, PETRI_DIFFERENCE_MINUEND_PLACES=845, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=97885, PETRI_PLACES=936, PETRI_TRANSITIONS=1980} [2024-06-27 18:07:04,929 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 908 predicate places. [2024-06-27 18:07:04,929 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 1980 transitions, 97885 flow [2024-06-27 18:07:04,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:04,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:07:04,930 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:07:04,946 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 18:07:05,145 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,SelfDestructingSolverStorable26 [2024-06-27 18:07:05,146 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 18:07:05,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:07:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash 538115048, now seen corresponding path program 23 times [2024-06-27 18:07:05,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:07:05,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064011499] [2024-06-27 18:07:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:07:05,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:07:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:07:05,327 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 18:07:05,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:07:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064011499] [2024-06-27 18:07:05,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064011499] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:07:05,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107563888] [2024-06-27 18:07:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:07:05,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:07:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:07:05,329 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 18:07:05,333 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 18:07:05,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 18:07:05,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:07:05,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 18:07:05,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:07:05,645 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 18:07:05,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:07:05,929 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 18:07:05,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107563888] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:07:05,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:07:05,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2024-06-27 18:07:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507013390] [2024-06-27 18:07:05,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:07:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 18:07:05,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:07:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 18:07:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 18:07:06,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:07:06,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 1980 transitions, 97885 flow. Second operand has 35 states, 35 states have (on average 6.714285714285714) internal successors, (235), 35 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:06,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:07:06,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:07:06,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:07:16,544 INFO L124 PetriNetUnfolderBase]: 4525/8167 cut-off events. [2024-06-27 18:07:16,545 INFO L125 PetriNetUnfolderBase]: For 847766/847766 co-relation queries the response was YES. [2024-06-27 18:07:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163042 conditions, 8167 events. 4525/8167 cut-off events. For 847766/847766 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 59774 event pairs, 132 based on Foata normal form. 12/8179 useless extension candidates. Maximal degree in co-relation 162654. Up to 4258 conditions per place. [2024-06-27 18:07:16,774 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 844 selfloop transitions, 1463 changer transitions 23/2333 dead transitions. [2024-06-27 18:07:16,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 975 places, 2333 transitions, 116370 flow [2024-06-27 18:07:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-06-27 18:07:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-06-27 18:07:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 588 transitions. [2024-06-27 18:07:16,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-27 18:07:16,777 INFO L175 Difference]: Start difference. First operand has 936 places, 1980 transitions, 97885 flow. Second operand 60 states and 588 transitions. [2024-06-27 18:07:16,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 975 places, 2333 transitions, 116370 flow [2024-06-27 18:07:32,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 2333 transitions, 114704 flow, removed 178 selfloop flow, removed 78 redundant places. [2024-06-27 18:07:32,487 INFO L231 Difference]: Finished difference. Result has 919 places, 2158 transitions, 112461 flow [2024-06-27 18:07:32,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95498, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=112461, PETRI_PLACES=919, PETRI_TRANSITIONS=2158} [2024-06-27 18:07:32,490 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 891 predicate places. [2024-06-27 18:07:32,490 INFO L495 AbstractCegarLoop]: Abstraction has has 919 places, 2158 transitions, 112461 flow [2024-06-27 18:07:32,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.714285714285714) internal successors, (235), 35 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:32,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:07:32,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:07:32,507 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 18:07:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:07:32,708 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 18:07:32,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:07:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1943511512, now seen corresponding path program 24 times [2024-06-27 18:07:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:07:32,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814304775] [2024-06-27 18:07:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:07:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:07:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:07:32,876 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 18:07:32,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:07:32,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814304775] [2024-06-27 18:07:32,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814304775] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:07:32,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222104829] [2024-06-27 18:07:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:07:32,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:07:32,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:07:32,877 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 18:07:32,878 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 18:07:32,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:07:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:07:32,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:07:32,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:07:33,192 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 18:07:33,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:07:33,537 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 18:07:33,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222104829] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:07:33,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:07:33,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:07:33,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335978981] [2024-06-27 18:07:33,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:07:33,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:07:33,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:07:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:07:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:07:33,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:07:33,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 2158 transitions, 112461 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:07:33,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:07:33,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:07:33,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:07:44,739 INFO L124 PetriNetUnfolderBase]: 4693/8484 cut-off events. [2024-06-27 18:07:44,739 INFO L125 PetriNetUnfolderBase]: For 942909/942909 co-relation queries the response was YES. [2024-06-27 18:07:45,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175288 conditions, 8484 events. 4693/8484 cut-off events. For 942909/942909 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 62559 event pairs, 136 based on Foata normal form. 5/8489 useless extension candidates. Maximal degree in co-relation 174799. Up to 4134 conditions per place. [2024-06-27 18:07:45,075 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 860 selfloop transitions, 1541 changer transitions 17/2421 dead transitions. [2024-06-27 18:07:45,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 2421 transitions, 125021 flow [2024-06-27 18:07:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 18:07:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 18:07:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 665 transitions. [2024-06-27 18:07:45,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376131221719457 [2024-06-27 18:07:45,077 INFO L175 Difference]: Start difference. First operand has 919 places, 2158 transitions, 112461 flow. Second operand 68 states and 665 transitions. [2024-06-27 18:07:45,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 2421 transitions, 125021 flow [2024-06-27 18:08:00,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 971 places, 2421 transitions, 124247 flow, removed 270 selfloop flow, removed 13 redundant places. [2024-06-27 18:08:00,919 INFO L231 Difference]: Finished difference. Result has 987 places, 2256 transitions, 122696 flow [2024-06-27 18:08:00,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=111786, PETRI_DIFFERENCE_MINUEND_PLACES=904, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=122696, PETRI_PLACES=987, PETRI_TRANSITIONS=2256} [2024-06-27 18:08:00,922 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 959 predicate places. [2024-06-27 18:08:00,922 INFO L495 AbstractCegarLoop]: Abstraction has has 987 places, 2256 transitions, 122696 flow [2024-06-27 18:08:00,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:08:00,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:08:00,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:08:00,935 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 18:08:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 18:08:01,125 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 18:08:01,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:08:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1787358766, now seen corresponding path program 25 times [2024-06-27 18:08:01,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:08:01,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591336610] [2024-06-27 18:08:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:08:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:08:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:08:01,283 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 18:08:01,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:08:01,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591336610] [2024-06-27 18:08:01,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591336610] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:08:01,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111853029] [2024-06-27 18:08:01,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:08:01,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:08:01,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:08:01,285 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 18:08:01,287 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 18:08:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:08:01,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:08:01,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:08:01,586 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 18:08:01,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:08:01,951 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 18:08:01,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111853029] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:08:01,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:08:01,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:08:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971602228] [2024-06-27 18:08:01,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:08:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:08:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:08:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:08:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:08:02,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:08:02,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 2256 transitions, 122696 flow. Second operand has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:08:02,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:08:02,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:08:02,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:08:15,405 INFO L124 PetriNetUnfolderBase]: 5028/9153 cut-off events. [2024-06-27 18:08:15,406 INFO L125 PetriNetUnfolderBase]: For 1188917/1188917 co-relation queries the response was YES. [2024-06-27 18:08:15,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198363 conditions, 9153 events. 5028/9153 cut-off events. For 1188917/1188917 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 69113 event pairs, 117 based on Foata normal form. 8/9161 useless extension candidates. Maximal degree in co-relation 197791. Up to 3359 conditions per place. [2024-06-27 18:08:15,614 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 773 selfloop transitions, 1872 changer transitions 23/2671 dead transitions. [2024-06-27 18:08:15,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1081 places, 2671 transitions, 143414 flow [2024-06-27 18:08:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-06-27 18:08:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2024-06-27 18:08:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 972 transitions. [2024-06-27 18:08:15,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776223776223776 [2024-06-27 18:08:15,616 INFO L175 Difference]: Start difference. First operand has 987 places, 2256 transitions, 122696 flow. Second operand 99 states and 972 transitions. [2024-06-27 18:08:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1081 places, 2671 transitions, 143414 flow [2024-06-27 18:08:32,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1049 places, 2671 transitions, 142227 flow, removed 287 selfloop flow, removed 32 redundant places. [2024-06-27 18:08:32,933 INFO L231 Difference]: Finished difference. Result has 1070 places, 2446 transitions, 139996 flow [2024-06-27 18:08:32,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=121795, PETRI_DIFFERENCE_MINUEND_PLACES=951, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=139996, PETRI_PLACES=1070, PETRI_TRANSITIONS=2446} [2024-06-27 18:08:32,936 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1042 predicate places. [2024-06-27 18:08:32,936 INFO L495 AbstractCegarLoop]: Abstraction has has 1070 places, 2446 transitions, 139996 flow [2024-06-27 18:08:32,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.764705882352941) internal successors, (230), 34 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:08:32,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:08:32,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:08:32,947 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 18:08:33,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:08:33,148 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 18:08:33,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:08:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1039676052, now seen corresponding path program 26 times [2024-06-27 18:08:33,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:08:33,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247366731] [2024-06-27 18:08:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:08:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:08:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:08:33,324 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 18:08:33,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:08:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247366731] [2024-06-27 18:08:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247366731] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:08:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610814223] [2024-06-27 18:08:33,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:08:33,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:08:33,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:08:33,337 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 18:08:33,338 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 18:08:33,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:08:33,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:08:33,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:08:33,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:08:33,654 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 18:08:33,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:08:34,135 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 18:08:34,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610814223] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:08:34,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:08:34,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:08:34,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655166754] [2024-06-27 18:08:34,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:08:34,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:08:34,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:08:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:08:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:08:34,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:08:34,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1070 places, 2446 transitions, 139996 flow. Second operand has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:08:34,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:08:34,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:08:34,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:08:48,355 INFO L124 PetriNetUnfolderBase]: 5212/9480 cut-off events. [2024-06-27 18:08:48,356 INFO L125 PetriNetUnfolderBase]: For 1367804/1367804 co-relation queries the response was YES. [2024-06-27 18:08:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215656 conditions, 9480 events. 5212/9480 cut-off events. For 1367804/1367804 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 71993 event pairs, 108 based on Foata normal form. 14/9494 useless extension candidates. Maximal degree in co-relation 215048. Up to 4047 conditions per place. [2024-06-27 18:08:48,588 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 957 selfloop transitions, 1727 changer transitions 36/2723 dead transitions. [2024-06-27 18:08:48,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 2723 transitions, 154870 flow [2024-06-27 18:08:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-06-27 18:08:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-06-27 18:08:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 787 transitions. [2024-06-27 18:08:48,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982793522267207 [2024-06-27 18:08:48,589 INFO L175 Difference]: Start difference. First operand has 1070 places, 2446 transitions, 139996 flow. Second operand 76 states and 787 transitions. [2024-06-27 18:08:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 2723 transitions, 154870 flow [2024-06-27 18:09:10,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1092 places, 2723 transitions, 152036 flow, removed 1121 selfloop flow, removed 39 redundant places. [2024-06-27 18:09:10,610 INFO L231 Difference]: Finished difference. Result has 1109 places, 2532 transitions, 149884 flow [2024-06-27 18:09:10,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=137566, PETRI_DIFFERENCE_MINUEND_PLACES=1017, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=149884, PETRI_PLACES=1109, PETRI_TRANSITIONS=2532} [2024-06-27 18:09:10,612 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1081 predicate places. [2024-06-27 18:09:10,612 INFO L495 AbstractCegarLoop]: Abstraction has has 1109 places, 2532 transitions, 149884 flow [2024-06-27 18:09:10,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:09:10,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:09:10,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:09:10,775 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 18:09:10,822 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,SelfDestructingSolverStorable30 [2024-06-27 18:09:10,822 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 18:09:10,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:09:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1015074224, now seen corresponding path program 27 times [2024-06-27 18:09:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:09:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922156309] [2024-06-27 18:09:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:09:10,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:09:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:09:10,991 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 18:09:10,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:09:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922156309] [2024-06-27 18:09:10,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922156309] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:09:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490359465] [2024-06-27 18:09:10,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:09:10,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:09:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:09:10,993 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 18:09:10,994 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 18:09:11,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 18:09:11,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:09:11,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2024-06-27 18:09:11,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:09:11,374 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 18:09:11,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:09:11,758 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 18:09:11,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490359465] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:09:11,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:09:11,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-06-27 18:09:11,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948198031] [2024-06-27 18:09:11,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:09:11,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-06-27 18:09:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:09:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-06-27 18:09:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-06-27 18:09:11,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:09:11,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1109 places, 2532 transitions, 149884 flow. Second operand has 34 states, 34 states have (on average 6.794117647058823) internal successors, (231), 34 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:09:11,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:09:11,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:09:11,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand