./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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.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.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/popl20-nonblocking-cntr.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 18:03:31,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:03:31,771 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:03:31,775 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:03:31,776 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:03:31,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:03:31,817 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:03:31,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:03:31,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:03:31,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:03:31,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:03:31,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:03:31,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:03:31,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:03:31,819 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:03:31,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:03:31,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:03:31,820 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:03:31,820 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:03:31,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:03:31,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:03:31,821 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:03:31,821 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:03:31,822 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:03:31,822 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:03:31,822 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:03:31,822 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:03:31,823 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:03:31,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:03:31,823 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:03:31,824 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:03:31,824 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:03:31,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:31,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:03:31,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:03:31,825 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:03:31,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:03:31,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:03:31,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:03:31,826 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:03:31,826 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:03:31,826 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:03:31,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:03:31,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:03:32,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:03:32,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:03:32,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:03:32,071 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:03:32,071 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:03:32,072 INFO L431 ainManager$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.wvr.yml/witness.yml [2024-06-27 18:03:32,142 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:03:32,143 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:03:32,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-06-27 18:03:33,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:03:33,304 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:03:33,304 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2024-06-27 18:03:33,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692f7df59/6100997a95e64eeba35c33bffab5067d/FLAG7be5eb5d8 [2024-06-27 18:03:33,324 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/692f7df59/6100997a95e64eeba35c33bffab5067d [2024-06-27 18:03:33,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:03:33,326 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:03:33,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:33,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:03:33,332 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:03:33,332 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 18:03:33,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240bc77f 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 18:03:33,333 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 18:03:33,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d686a3f 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 18:03:33,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:33" (2/2) ... [2024-06-27 18:03:33,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240bc77f 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 18:03:33,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:33" (2/2) ... [2024-06-27 18:03:33,338 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:03:33,353 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:03:33,354 INFO L97 edCorrectnessWitness]: Location invariant before [L73-L73] ! multithreaded || 0 <= counter [2024-06-27 18:03:33,354 INFO L97 edCorrectnessWitness]: Location invariant before [L72-L72] ! multithreaded || 0 <= counter [2024-06-27 18:03:33,354 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:03:33,354 INFO L106 edCorrectnessWitness]: ghost_update [L71-L71] multithreaded = 1; [2024-06-27 18:03:33,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:03:33,501 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-06-27 18:03:33,504 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:33,512 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:03:33,547 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-06-27 18:03:33,548 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:33,560 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:03:33,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33 WrapperNode [2024-06-27 18:03:33,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:33,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:33,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:03:33,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:03:33,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,592 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2024-06-27 18:03:33,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:33,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:03:33,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:03:33,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:03:33,601 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,635 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 18:03:33,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,636 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,644 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,653 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:03:33,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:03:33,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:03:33,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:03:33,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (1/1) ... [2024-06-27 18:03:33,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:33,684 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 18:03:33,693 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 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:03:33,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:03:33,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:03:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:03:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:03:33,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:03:33,720 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 18:03:33,788 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:03:33,789 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:03:33,904 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:03:33,904 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:03:34,026 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:03:34,027 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 18:03:34,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:34 BoogieIcfgContainer [2024-06-27 18:03:34,027 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:03:34,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:03:34,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:03:34,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:03:34,031 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 18:03:34,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7e2526 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 18:03:34,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:03:33" (2/4) ... [2024-06-27 18:03:34,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7e2526 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 18:03:34,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:33" (3/4) ... [2024-06-27 18:03:34,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7e2526 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 18:03:34,033 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 18:03:34,034 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-06-27 18:03:34,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:03:34,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:03:34,050 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:03:34,084 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:03:34,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 66 flow [2024-06-27 18:03:34,126 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2024-06-27 18:03:34,126 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:03:34,128 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 27 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 18:03:34,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 66 flow [2024-06-27 18:03:34,133 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 23 transitions, 58 flow [2024-06-27 18:03:34,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:03:34,153 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;@7af8c1e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:03:34,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:03:34,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:03:34,157 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-27 18:03:34,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:03:34,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:34,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:03:34,158 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 18:03:34,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 222398889, now seen corresponding path program 1 times [2024-06-27 18:03:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:34,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061720943] [2024-06-27 18:03:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:34,306 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 18:03:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:34,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061720943] [2024-06-27 18:03:34,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061720943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:34,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:03:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233142149] [2024-06-27 18:03:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:34,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:34,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:34,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:34,419 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 18:03:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:34,526 INFO L124 PetriNetUnfolderBase]: 100/198 cut-off events. [2024-06-27 18:03:34,527 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-27 18:03:34,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 198 events. 100/198 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 656 event pairs, 32 based on Foata normal form. 10/203 useless extension candidates. Maximal degree in co-relation 349. Up to 114 conditions per place. [2024-06-27 18:03:34,532 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 24 selfloop transitions, 2 changer transitions 3/34 dead transitions. [2024-06-27 18:03:34,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 34 transitions, 147 flow [2024-06-27 18:03:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-27 18:03:34,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2024-06-27 18:03:34,545 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 3 states and 53 transitions. [2024-06-27 18:03:34,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 34 transitions, 147 flow [2024-06-27 18:03:34,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 133 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:34,551 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 66 flow [2024-06-27 18:03:34,553 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=66, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-06-27 18:03:34,558 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-06-27 18:03:34,558 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 66 flow [2024-06-27 18:03:34,558 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 18:03:34,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:34,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:34,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:03:34,559 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 18:03:34,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1633772955, now seen corresponding path program 1 times [2024-06-27 18:03:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:34,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184416951] [2024-06-27 18:03:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:34,635 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 18:03:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:34,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184416951] [2024-06-27 18:03:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184416951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:34,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:34,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:34,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423108170] [2024-06-27 18:03:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:34,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:34,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:34,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 66 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 18:03:34,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:34,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:34,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:34,749 INFO L124 PetriNetUnfolderBase]: 111/227 cut-off events. [2024-06-27 18:03:34,750 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 18:03:34,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 227 events. 111/227 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 768 event pairs, 27 based on Foata normal form. 12/237 useless extension candidates. Maximal degree in co-relation 140. Up to 73 conditions per place. [2024-06-27 18:03:34,752 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 31 selfloop transitions, 3 changer transitions 3/42 dead transitions. [2024-06-27 18:03:34,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 183 flow [2024-06-27 18:03:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-06-27 18:03:34,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6442307692307693 [2024-06-27 18:03:34,756 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 66 flow. Second operand 4 states and 67 transitions. [2024-06-27 18:03:34,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 183 flow [2024-06-27 18:03:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:34,760 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 74 flow [2024-06-27 18:03:34,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=60, 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=74, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-06-27 18:03:34,761 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-27 18:03:34,761 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 74 flow [2024-06-27 18:03:34,761 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 18:03:34,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:34,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:34,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:03:34,762 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 18:03:34,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash -438241960, now seen corresponding path program 1 times [2024-06-27 18:03:34,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:34,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134018645] [2024-06-27 18:03:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:34,879 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 18:03:34,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:34,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134018645] [2024-06-27 18:03:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134018645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:34,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:34,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268958322] [2024-06-27 18:03:34,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:34,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:34,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:34,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 74 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 18:03:34,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:34,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:34,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:34,964 INFO L124 PetriNetUnfolderBase]: 120/247 cut-off events. [2024-06-27 18:03:34,964 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-06-27 18:03:34,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 247 events. 120/247 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 849 event pairs, 29 based on Foata normal form. 12/257 useless extension candidates. Maximal degree in co-relation 147. Up to 107 conditions per place. [2024-06-27 18:03:34,970 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 28 selfloop transitions, 6 changer transitions 3/42 dead transitions. [2024-06-27 18:03:34,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 193 flow [2024-06-27 18:03:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-06-27 18:03:34,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-27 18:03:34,975 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 74 flow. Second operand 5 states and 73 transitions. [2024-06-27 18:03:34,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 193 flow [2024-06-27 18:03:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:34,978 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 103 flow [2024-06-27 18:03:34,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=64, 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=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-27 18:03:34,979 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-27 18:03:34,980 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 103 flow [2024-06-27 18:03:34,980 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 18:03:34,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:34,980 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 18:03:34,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:03:34,981 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 18:03:34,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1664503334, now seen corresponding path program 1 times [2024-06-27 18:03:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:34,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969986121] [2024-06-27 18:03:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,078 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 18:03:35,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969986121] [2024-06-27 18:03:35,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969986121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:35,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:35,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820970349] [2024-06-27 18:03:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:35,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 26 [2024-06-27 18:03:35,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 103 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 18:03:35,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 26 [2024-06-27 18:03:35,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,150 INFO L124 PetriNetUnfolderBase]: 140/295 cut-off events. [2024-06-27 18:03:35,151 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-27 18:03:35,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 295 events. 140/295 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1110 event pairs, 74 based on Foata normal form. 14/308 useless extension candidates. Maximal degree in co-relation 405. Up to 215 conditions per place. [2024-06-27 18:03:35,152 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 26 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-06-27 18:03:35,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 203 flow [2024-06-27 18:03:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-27 18:03:35,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-27 18:03:35,155 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 103 flow. Second operand 4 states and 60 transitions. [2024-06-27 18:03:35,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 203 flow [2024-06-27 18:03:35,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 191 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:35,159 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 123 flow [2024-06-27 18:03:35,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=34, PETRI_TRANSITIONS=28} [2024-06-27 18:03:35,160 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-06-27 18:03:35,160 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 123 flow [2024-06-27 18:03:35,161 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 18:03:35,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,161 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 18:03:35,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:03:35,161 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 18:03:35,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1575249380, now seen corresponding path program 1 times [2024-06-27 18:03:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598903672] [2024-06-27 18:03:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,324 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 18:03:35,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:35,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598903672] [2024-06-27 18:03:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598903672] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292976362] [2024-06-27 18:03:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:35,327 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 18:03:35,336 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 18:03:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:35,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 18:03:35,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:35,466 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 18:03:35,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:35,633 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 18:03:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292976362] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:35,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:35,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-06-27 18:03:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877006783] [2024-06-27 18:03:35,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:35,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:03:35,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:03:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:03:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-06-27 18:03:35,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 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 18:03:35,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:35,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-06-27 18:03:35,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:35,766 INFO L124 PetriNetUnfolderBase]: 200/371 cut-off events. [2024-06-27 18:03:35,766 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-27 18:03:35,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 371 events. 200/371 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1364 event pairs, 30 based on Foata normal form. 14/384 useless extension candidates. Maximal degree in co-relation 523. Up to 144 conditions per place. [2024-06-27 18:03:35,768 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 37 selfloop transitions, 10 changer transitions 4/55 dead transitions. [2024-06-27 18:03:35,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 318 flow [2024-06-27 18:03:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:03:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:03:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-27 18:03:35,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-27 18:03:35,771 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 123 flow. Second operand 6 states and 82 transitions. [2024-06-27 18:03:35,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 318 flow [2024-06-27 18:03:35,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 309 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:35,773 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 196 flow [2024-06-27 18:03:35,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=196, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-06-27 18:03:35,773 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2024-06-27 18:03:35,774 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 196 flow [2024-06-27 18:03:35,774 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 18:03:35,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,774 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 18:03:35,791 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 18:03:35,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:35,988 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 18:03:35,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1617614296, now seen corresponding path program 2 times [2024-06-27 18:03:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141739634] [2024-06-27 18:03:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:36,109 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 18:03:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141739634] [2024-06-27 18:03:36,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141739634] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160233295] [2024-06-27 18:03:36,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:36,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:36,114 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 18:03:36,115 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 18:03:36,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:36,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:36,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:03:36,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:36,188 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 18:03:36,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:36,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160233295] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:36,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:36,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2024-06-27 18:03:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252894892] [2024-06-27 18:03:36,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:36,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:03:36,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:03:36,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:36,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:36,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:03:36,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:36,485 INFO L124 PetriNetUnfolderBase]: 219/452 cut-off events. [2024-06-27 18:03:36,486 INFO L125 PetriNetUnfolderBase]: For 1513/1544 co-relation queries the response was YES. [2024-06-27 18:03:36,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 452 events. 219/452 cut-off events. For 1513/1544 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1929 event pairs, 48 based on Foata normal form. 4/451 useless extension candidates. Maximal degree in co-relation 948. Up to 174 conditions per place. [2024-06-27 18:03:36,489 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 42 selfloop transitions, 9 changer transitions 3/60 dead transitions. [2024-06-27 18:03:36,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 444 flow [2024-06-27 18:03:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-27 18:03:36,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-06-27 18:03:36,492 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 196 flow. Second operand 4 states and 70 transitions. [2024-06-27 18:03:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 444 flow [2024-06-27 18:03:36,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:36,497 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 307 flow [2024-06-27 18:03:36,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 18:03:36,499 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-06-27 18:03:36,500 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 307 flow [2024-06-27 18:03:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:36,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:36,500 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 18:03:36,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:36,712 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,SelfDestructingSolverStorable5 [2024-06-27 18:03:36,712 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 18:03:36,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:36,713 INFO L85 PathProgramCache]: Analyzing trace with hash -748183216, now seen corresponding path program 3 times [2024-06-27 18:03:36,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:36,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44822831] [2024-06-27 18:03:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:36,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44822831] [2024-06-27 18:03:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44822831] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293322593] [2024-06-27 18:03:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:36,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:36,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:36,812 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 18:03:36,828 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 18:03:36,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 18:03:36,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:36,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:36,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:36,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293322593] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:37,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:37,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 18:03:37,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981526553] [2024-06-27 18:03:37,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:37,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:03:37,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:03:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:03:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:37,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 307 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:37,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:37,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:37,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:37,783 INFO L124 PetriNetUnfolderBase]: 918/1515 cut-off events. [2024-06-27 18:03:37,784 INFO L125 PetriNetUnfolderBase]: For 4854/4854 co-relation queries the response was YES. [2024-06-27 18:03:37,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 1515 events. 918/1515 cut-off events. For 4854/4854 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6796 event pairs, 36 based on Foata normal form. 0/1371 useless extension candidates. Maximal degree in co-relation 3141. Up to 285 conditions per place. [2024-06-27 18:03:37,795 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 126 selfloop transitions, 91 changer transitions 7/227 dead transitions. [2024-06-27 18:03:37,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 227 transitions, 1951 flow [2024-06-27 18:03:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 18:03:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 18:03:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 332 transitions. [2024-06-27 18:03:37,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256410256410256 [2024-06-27 18:03:37,798 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 307 flow. Second operand 30 states and 332 transitions. [2024-06-27 18:03:37,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 227 transitions, 1951 flow [2024-06-27 18:03:37,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 227 transitions, 1929 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:37,827 INFO L231 Difference]: Finished difference. Result has 81 places, 132 transitions, 1336 flow [2024-06-27 18:03:37,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1336, PETRI_PLACES=81, PETRI_TRANSITIONS=132} [2024-06-27 18:03:37,828 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-27 18:03:37,828 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 132 transitions, 1336 flow [2024-06-27 18:03:37,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:37,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:37,829 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 18:03:37,843 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 18:03:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:38,030 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 18:03:38,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2075968970, now seen corresponding path program 4 times [2024-06-27 18:03:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:38,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428079722] [2024-06-27 18:03:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:38,136 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 18:03:38,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:38,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428079722] [2024-06-27 18:03:38,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428079722] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:38,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530133995] [2024-06-27 18:03:38,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:38,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:38,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:38,138 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 18:03:38,160 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 18:03:38,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:38,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 18:03:38,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:38,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530133995] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:38,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-06-27 18:03:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555743175] [2024-06-27 18:03:38,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 18:03:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 18:03:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-27 18:03:38,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:38,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 132 transitions, 1336 flow. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:38,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:38,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:38,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:38,941 INFO L124 PetriNetUnfolderBase]: 1312/2185 cut-off events. [2024-06-27 18:03:38,941 INFO L125 PetriNetUnfolderBase]: For 11678/11678 co-relation queries the response was YES. [2024-06-27 18:03:38,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 2185 events. 1312/2185 cut-off events. For 11678/11678 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10638 event pairs, 34 based on Foata normal form. 44/2229 useless extension candidates. Maximal degree in co-relation 6487. Up to 416 conditions per place. [2024-06-27 18:03:38,956 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 230 selfloop transitions, 182 changer transitions 26/441 dead transitions. [2024-06-27 18:03:38,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 441 transitions, 4297 flow [2024-06-27 18:03:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 18:03:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 18:03:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 415 transitions. [2024-06-27 18:03:38,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200404858299595 [2024-06-27 18:03:38,958 INFO L175 Difference]: Start difference. First operand has 81 places, 132 transitions, 1336 flow. Second operand 38 states and 415 transitions. [2024-06-27 18:03:38,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 441 transitions, 4297 flow [2024-06-27 18:03:38,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 441 transitions, 3989 flow, removed 147 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:38,989 INFO L231 Difference]: Finished difference. Result has 138 places, 246 transitions, 2904 flow [2024-06-27 18:03:38,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2904, PETRI_PLACES=138, PETRI_TRANSITIONS=246} [2024-06-27 18:03:38,990 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2024-06-27 18:03:38,990 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 246 transitions, 2904 flow [2024-06-27 18:03:38,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:38,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:38,991 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 18:03:39,006 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 18:03:39,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:39,202 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 18:03:39,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash -255762638, now seen corresponding path program 5 times [2024-06-27 18:03:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:39,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669931644] [2024-06-27 18:03:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:39,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669931644] [2024-06-27 18:03:39,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669931644] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997100293] [2024-06-27 18:03:39,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:03:39,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:39,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:39,315 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 18:03:39,332 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 18:03:39,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:03:39,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:39,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 18:03:39,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:39,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:39,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997100293] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:39,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:39,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2024-06-27 18:03:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076493792] [2024-06-27 18:03:39,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 18:03:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 18:03:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:03:39,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:39,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 246 transitions, 2904 flow. Second operand has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:39,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:39,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:39,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:40,365 INFO L124 PetriNetUnfolderBase]: 1724/2870 cut-off events. [2024-06-27 18:03:40,365 INFO L125 PetriNetUnfolderBase]: For 38252/38252 co-relation queries the response was YES. [2024-06-27 18:03:40,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17803 conditions, 2870 events. 1724/2870 cut-off events. For 38252/38252 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15064 event pairs, 22 based on Foata normal form. 124/2994 useless extension candidates. Maximal degree in co-relation 17416. Up to 581 conditions per place. [2024-06-27 18:03:40,394 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 223 selfloop transitions, 267 changer transitions 3/496 dead transitions. [2024-06-27 18:03:40,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 496 transitions, 6538 flow [2024-06-27 18:03:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 18:03:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 18:03:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 334 transitions. [2024-06-27 18:03:40,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143920595533499 [2024-06-27 18:03:40,397 INFO L175 Difference]: Start difference. First operand has 138 places, 246 transitions, 2904 flow. Second operand 31 states and 334 transitions. [2024-06-27 18:03:40,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 496 transitions, 6538 flow [2024-06-27 18:03:40,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 496 transitions, 6268 flow, removed 134 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:40,454 INFO L231 Difference]: Finished difference. Result has 175 places, 347 transitions, 4769 flow [2024-06-27 18:03:40,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4769, PETRI_PLACES=175, PETRI_TRANSITIONS=347} [2024-06-27 18:03:40,455 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 147 predicate places. [2024-06-27 18:03:40,455 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 347 transitions, 4769 flow [2024-06-27 18:03:40,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.444444444444445) internal successors, (134), 18 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:40,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:40,456 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 18:03:40,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:40,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:40,667 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 18:03:40,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash -934909356, now seen corresponding path program 6 times [2024-06-27 18:03:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:40,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278179592] [2024-06-27 18:03:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:40,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:40,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278179592] [2024-06-27 18:03:40,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278179592] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:40,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093879159] [2024-06-27 18:03:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:03:40,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:40,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:40,739 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 18:03:40,741 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 18:03:40,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 18:03:40,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:40,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:40,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:40,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:40,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093879159] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:40,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:40,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-06-27 18:03:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653902897] [2024-06-27 18:03:40,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:40,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:03:40,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:03:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:03:40,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:40,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 347 transitions, 4769 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:42,005 INFO L124 PetriNetUnfolderBase]: 1779/2990 cut-off events. [2024-06-27 18:03:42,005 INFO L125 PetriNetUnfolderBase]: For 57165/57165 co-relation queries the response was YES. [2024-06-27 18:03:42,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 2990 events. 1779/2990 cut-off events. For 57165/57165 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15967 event pairs, 10 based on Foata normal form. 85/3075 useless extension candidates. Maximal degree in co-relation 21081. Up to 582 conditions per place. [2024-06-27 18:03:42,045 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 211 selfloop transitions, 361 changer transitions 3/578 dead transitions. [2024-06-27 18:03:42,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 578 transitions, 8808 flow [2024-06-27 18:03:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-27 18:03:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-27 18:03:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 508 transitions. [2024-06-27 18:03:42,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987441130298273 [2024-06-27 18:03:42,048 INFO L175 Difference]: Start difference. First operand has 175 places, 347 transitions, 4769 flow. Second operand 49 states and 508 transitions. [2024-06-27 18:03:42,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 578 transitions, 8808 flow [2024-06-27 18:03:42,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 578 transitions, 8369 flow, removed 187 selfloop flow, removed 10 redundant places. [2024-06-27 18:03:42,213 INFO L231 Difference]: Finished difference. Result has 234 places, 438 transitions, 7169 flow [2024-06-27 18:03:42,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7169, PETRI_PLACES=234, PETRI_TRANSITIONS=438} [2024-06-27 18:03:42,215 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 206 predicate places. [2024-06-27 18:03:42,215 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 438 transitions, 7169 flow [2024-06-27 18:03:42,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:42,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:42,216 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 18:03:42,234 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 18:03:42,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:42,432 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 18:03:42,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -108223470, now seen corresponding path program 7 times [2024-06-27 18:03:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270127185] [2024-06-27 18:03:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:42,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:42,520 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 18:03:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270127185] [2024-06-27 18:03:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270127185] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130169749] [2024-06-27 18:03:42,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:03:42,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:42,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:42,521 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 18:03:42,522 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 18:03:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:42,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:03:42,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:42,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:42,731 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 18:03:42,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130169749] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:42,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:42,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-06-27 18:03:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930926001] [2024-06-27 18:03:42,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:42,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:03:42,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:42,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:03:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:03:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:42,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 438 transitions, 7169 flow. Second operand has 23 states, 23 states have (on average 7.478260869565218) internal successors, (172), 23 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:44,404 INFO L124 PetriNetUnfolderBase]: 2955/4952 cut-off events. [2024-06-27 18:03:44,405 INFO L125 PetriNetUnfolderBase]: For 143052/143052 co-relation queries the response was YES. [2024-06-27 18:03:44,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41470 conditions, 4952 events. 2955/4952 cut-off events. For 143052/143052 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28372 event pairs, 14 based on Foata normal form. 102/5054 useless extension candidates. Maximal degree in co-relation 41052. Up to 1017 conditions per place. [2024-06-27 18:03:44,461 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 348 selfloop transitions, 632 changer transitions 5/988 dead transitions. [2024-06-27 18:03:44,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 988 transitions, 17905 flow [2024-06-27 18:03:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-27 18:03:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-27 18:03:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 477 transitions. [2024-06-27 18:03:44,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3988294314381271 [2024-06-27 18:03:44,463 INFO L175 Difference]: Start difference. First operand has 234 places, 438 transitions, 7169 flow. Second operand 46 states and 477 transitions. [2024-06-27 18:03:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 988 transitions, 17905 flow [2024-06-27 18:03:44,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 988 transitions, 17059 flow, removed 257 selfloop flow, removed 17 redundant places. [2024-06-27 18:03:44,947 INFO L231 Difference]: Finished difference. Result has 279 places, 781 transitions, 14746 flow [2024-06-27 18:03:44,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=14746, PETRI_PLACES=279, PETRI_TRANSITIONS=781} [2024-06-27 18:03:44,948 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 251 predicate places. [2024-06-27 18:03:44,948 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 781 transitions, 14746 flow [2024-06-27 18:03:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.478260869565218) internal successors, (172), 23 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:44,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:44,948 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 18:03:44,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 18:03:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:45,150 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 18:03:45,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash 175733068, now seen corresponding path program 8 times [2024-06-27 18:03:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020981733] [2024-06-27 18:03:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020981733] [2024-06-27 18:03:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020981733] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148669411] [2024-06-27 18:03:45,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:45,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:45,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:45,226 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 18:03:45,249 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 18:03:45,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:45,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:45,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:45,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:45,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148669411] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:45,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 18:03:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975663339] [2024-06-27 18:03:45,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:45,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:45,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 781 transitions, 14746 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:45,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:45,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:47,475 INFO L124 PetriNetUnfolderBase]: 3380/5632 cut-off events. [2024-06-27 18:03:47,475 INFO L125 PetriNetUnfolderBase]: For 228293/228293 co-relation queries the response was YES. [2024-06-27 18:03:47,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53109 conditions, 5632 events. 3380/5632 cut-off events. For 228293/228293 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32915 event pairs, 69 based on Foata normal form. 16/5648 useless extension candidates. Maximal degree in co-relation 51758. Up to 1247 conditions per place. [2024-06-27 18:03:47,544 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 455 selfloop transitions, 569 changer transitions 4/1031 dead transitions. [2024-06-27 18:03:47,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1031 transitions, 21310 flow [2024-06-27 18:03:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 18:03:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 18:03:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 348 transitions. [2024-06-27 18:03:47,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936651583710407 [2024-06-27 18:03:47,546 INFO L175 Difference]: Start difference. First operand has 279 places, 781 transitions, 14746 flow. Second operand 34 states and 348 transitions. [2024-06-27 18:03:47,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1031 transitions, 21310 flow [2024-06-27 18:03:48,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1031 transitions, 20599 flow, removed 308 selfloop flow, removed 11 redundant places. [2024-06-27 18:03:48,440 INFO L231 Difference]: Finished difference. Result has 309 places, 883 transitions, 17378 flow [2024-06-27 18:03:48,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=14353, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17378, PETRI_PLACES=309, PETRI_TRANSITIONS=883} [2024-06-27 18:03:48,441 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 281 predicate places. [2024-06-27 18:03:48,441 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 883 transitions, 17378 flow [2024-06-27 18:03:48,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:48,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:48,442 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 18:03:48,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 18:03:48,645 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,SelfDestructingSolverStorable11 [2024-06-27 18:03:48,646 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 18:03:48,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1417132590, now seen corresponding path program 9 times [2024-06-27 18:03:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:48,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740277448] [2024-06-27 18:03:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:48,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740277448] [2024-06-27 18:03:48,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740277448] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675827006] [2024-06-27 18:03:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:48,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:48,724 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 18:03:48,744 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 18:03:48,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 18:03:48,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:48,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:03:48,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:48,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675827006] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:48,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:48,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-06-27 18:03:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093470052] [2024-06-27 18:03:48,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 18:03:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 18:03:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:03:49,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:03:49,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 883 transitions, 17378 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:49,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:49,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:03:49,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:51,488 INFO L124 PetriNetUnfolderBase]: 3866/6469 cut-off events. [2024-06-27 18:03:51,489 INFO L125 PetriNetUnfolderBase]: For 255791/255791 co-relation queries the response was YES. [2024-06-27 18:03:51,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62176 conditions, 6469 events. 3866/6469 cut-off events. For 255791/255791 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 38915 event pairs, 53 based on Foata normal form. 83/6552 useless extension candidates. Maximal degree in co-relation 61770. Up to 1258 conditions per place. [2024-06-27 18:03:51,564 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 312 selfloop transitions, 902 changer transitions 2/1219 dead transitions. [2024-06-27 18:03:51,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1219 transitions, 25905 flow [2024-06-27 18:03:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-06-27 18:03:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-06-27 18:03:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 476 transitions. [2024-06-27 18:03:51,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979933110367893 [2024-06-27 18:03:51,573 INFO L175 Difference]: Start difference. First operand has 309 places, 883 transitions, 17378 flow. Second operand 46 states and 476 transitions. [2024-06-27 18:03:51,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1219 transitions, 25905 flow [2024-06-27 18:03:52,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1219 transitions, 25731 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-06-27 18:03:52,843 INFO L231 Difference]: Finished difference. Result has 360 places, 1075 transitions, 24739 flow [2024-06-27 18:03:52,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=17164, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=24739, PETRI_PLACES=360, PETRI_TRANSITIONS=1075} [2024-06-27 18:03:52,844 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 332 predicate places. [2024-06-27 18:03:52,844 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1075 transitions, 24739 flow [2024-06-27 18:03:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:52,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:52,845 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 18:03:52,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 18:03:53,045 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,SelfDestructingSolverStorable12 [2024-06-27 18:03:53,045 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 18:03:53,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash -362122510, now seen corresponding path program 10 times [2024-06-27 18:03:53,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:53,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123036234] [2024-06-27 18:03:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:53,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123036234] [2024-06-27 18:03:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123036234] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:53,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155820726] [2024-06-27 18:03:53,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:53,145 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 18:03:53,168 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 18:03:53,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:53,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:03:53,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:53,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:53,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155820726] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:53,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:53,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 21 [2024-06-27 18:03:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19840658] [2024-06-27 18:03:53,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:03:53,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:03:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:03:53,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-06-27 18:03:53,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1075 transitions, 24739 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:53,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:53,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-06-27 18:03:53,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:57,275 INFO L124 PetriNetUnfolderBase]: 6293/10086 cut-off events. [2024-06-27 18:03:57,275 INFO L125 PetriNetUnfolderBase]: For 485015/485015 co-relation queries the response was YES. [2024-06-27 18:03:57,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104063 conditions, 10086 events. 6293/10086 cut-off events. For 485015/485015 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 61194 event pairs, 156 based on Foata normal form. 27/10113 useless extension candidates. Maximal degree in co-relation 102855. Up to 2058 conditions per place. [2024-06-27 18:03:57,410 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 526 selfloop transitions, 659 changer transitions 4/1190 dead transitions. [2024-06-27 18:03:57,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1190 transitions, 28770 flow [2024-06-27 18:03:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 18:03:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 18:03:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 254 transitions. [2024-06-27 18:03:57,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757396449704142 [2024-06-27 18:03:57,413 INFO L175 Difference]: Start difference. First operand has 360 places, 1075 transitions, 24739 flow. Second operand 26 states and 254 transitions. [2024-06-27 18:03:57,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1190 transitions, 28770 flow [2024-06-27 18:04:00,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1190 transitions, 28129 flow, removed 253 selfloop flow, removed 19 redundant places. [2024-06-27 18:04:01,008 INFO L231 Difference]: Finished difference. Result has 369 places, 1076 transitions, 25850 flow [2024-06-27 18:04:01,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=23987, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25850, PETRI_PLACES=369, PETRI_TRANSITIONS=1076} [2024-06-27 18:04:01,010 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 341 predicate places. [2024-06-27 18:04:01,010 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1076 transitions, 25850 flow [2024-06-27 18:04:01,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:01,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:01,011 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 18:04:01,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:01,214 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,SelfDestructingSolverStorable13 [2024-06-27 18:04:01,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:01,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1132621562, now seen corresponding path program 11 times [2024-06-27 18:04:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059756538] [2024-06-27 18:04:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:01,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:01,330 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 18:04:01,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059756538] [2024-06-27 18:04:01,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059756538] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370407500] [2024-06-27 18:04:01,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:04:01,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:01,333 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 18:04:01,349 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 18:04:01,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 18:04:01,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:01,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:04:01,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:01,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:01,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370407500] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:01,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-06-27 18:04:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89496668] [2024-06-27 18:04:01,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 18:04:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 18:04:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-06-27 18:04:01,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:01,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1076 transitions, 25850 flow. Second operand has 23 states, 23 states have (on average 7.521739130434782) internal successors, (173), 23 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:01,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:01,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:01,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:04,753 INFO L124 PetriNetUnfolderBase]: 4295/7224 cut-off events. [2024-06-27 18:04:04,754 INFO L125 PetriNetUnfolderBase]: For 357536/357536 co-relation queries the response was YES. [2024-06-27 18:04:04,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79124 conditions, 7224 events. 4295/7224 cut-off events. For 357536/357536 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44965 event pairs, 39 based on Foata normal form. 128/7352 useless extension candidates. Maximal degree in co-relation 78300. Up to 3392 conditions per place. [2024-06-27 18:04:04,844 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 710 selfloop transitions, 640 changer transitions 3/1356 dead transitions. [2024-06-27 18:04:04,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1356 transitions, 34363 flow [2024-06-27 18:04:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 18:04:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 18:04:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 288 transitions. [2024-06-27 18:04:04,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260355029585799 [2024-06-27 18:04:04,846 INFO L175 Difference]: Start difference. First operand has 369 places, 1076 transitions, 25850 flow. Second operand 26 states and 288 transitions. [2024-06-27 18:04:04,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1356 transitions, 34363 flow [2024-06-27 18:04:07,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1356 transitions, 33224 flow, removed 74 selfloop flow, removed 21 redundant places. [2024-06-27 18:04:07,100 INFO L231 Difference]: Finished difference. Result has 389 places, 1187 transitions, 30310 flow [2024-06-27 18:04:07,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=24975, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=539, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=30310, PETRI_PLACES=389, PETRI_TRANSITIONS=1187} [2024-06-27 18:04:07,101 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 361 predicate places. [2024-06-27 18:04:07,101 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1187 transitions, 30310 flow [2024-06-27 18:04:07,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.521739130434782) internal successors, (173), 23 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:07,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:07,102 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 18:04:07,116 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 18:04:07,302 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,SelfDestructingSolverStorable14 [2024-06-27 18:04:07,303 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 18:04:07,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1778307146, now seen corresponding path program 12 times [2024-06-27 18:04:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:07,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548858116] [2024-06-27 18:04:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:07,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548858116] [2024-06-27 18:04:07,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548858116] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675086057] [2024-06-27 18:04:07,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:04:07,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:07,396 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 18:04:07,412 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 18:04:07,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 18:04:07,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:07,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:04:07,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:07,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:07,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675086057] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:07,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:07,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 18:04:07,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380568918] [2024-06-27 18:04:07,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:07,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:04:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:04:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:04:07,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:07,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1187 transitions, 30310 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:07,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:07,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:07,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:10,915 INFO L124 PetriNetUnfolderBase]: 4607/7679 cut-off events. [2024-06-27 18:04:10,915 INFO L125 PetriNetUnfolderBase]: For 412661/412661 co-relation queries the response was YES. [2024-06-27 18:04:10,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89145 conditions, 7679 events. 4607/7679 cut-off events. For 412661/412661 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 47886 event pairs, 125 based on Foata normal form. 18/7697 useless extension candidates. Maximal degree in co-relation 88266. Up to 1849 conditions per place. [2024-06-27 18:04:11,038 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 728 selfloop transitions, 630 changer transitions 4/1365 dead transitions. [2024-06-27 18:04:11,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1365 transitions, 37000 flow [2024-06-27 18:04:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:04:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:04:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 207 transitions. [2024-06-27 18:04:11,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190283400809717 [2024-06-27 18:04:11,039 INFO L175 Difference]: Start difference. First operand has 389 places, 1187 transitions, 30310 flow. Second operand 19 states and 207 transitions. [2024-06-27 18:04:11,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1365 transitions, 37000 flow [2024-06-27 18:04:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1365 transitions, 36480 flow, removed 171 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:14,010 INFO L231 Difference]: Finished difference. Result has 407 places, 1245 transitions, 33062 flow [2024-06-27 18:04:14,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=29741, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=33062, PETRI_PLACES=407, PETRI_TRANSITIONS=1245} [2024-06-27 18:04:14,011 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 379 predicate places. [2024-06-27 18:04:14,011 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1245 transitions, 33062 flow [2024-06-27 18:04:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:14,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:14,012 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 18:04:14,036 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 18:04:14,223 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,SelfDestructingSolverStorable15 [2024-06-27 18:04:14,223 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 18:04:14,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash 473003996, now seen corresponding path program 13 times [2024-06-27 18:04:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:14,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905802995] [2024-06-27 18:04:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:14,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905802995] [2024-06-27 18:04:14,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905802995] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591277832] [2024-06-27 18:04:14,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 18:04:14,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:14,313 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 18:04:14,314 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 18:04:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:14,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:04:14,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:14,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:14,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591277832] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:14,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-06-27 18:04:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245694358] [2024-06-27 18:04:14,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 18:04:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 18:04:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-06-27 18:04:14,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:14,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1245 transitions, 33062 flow. Second operand has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:14,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:14,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:14,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:18,168 INFO L124 PetriNetUnfolderBase]: 4948/8211 cut-off events. [2024-06-27 18:04:18,169 INFO L125 PetriNetUnfolderBase]: For 448942/448942 co-relation queries the response was YES. [2024-06-27 18:04:18,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96845 conditions, 8211 events. 4948/8211 cut-off events. For 448942/448942 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51724 event pairs, 222 based on Foata normal form. 28/8239 useless extension candidates. Maximal degree in co-relation 95961. Up to 6410 conditions per place. [2024-06-27 18:04:18,289 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1209 selfloop transitions, 210 changer transitions 4/1426 dead transitions. [2024-06-27 18:04:18,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1426 transitions, 39869 flow [2024-06-27 18:04:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:04:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:04:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 215 transitions. [2024-06-27 18:04:18,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-06-27 18:04:18,292 INFO L175 Difference]: Start difference. First operand has 407 places, 1245 transitions, 33062 flow. Second operand 20 states and 215 transitions. [2024-06-27 18:04:18,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1426 transitions, 39869 flow [2024-06-27 18:04:21,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1426 transitions, 39778 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 18:04:21,643 INFO L231 Difference]: Finished difference. Result has 424 places, 1307 transitions, 35172 flow [2024-06-27 18:04:21,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=32911, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=35172, PETRI_PLACES=424, PETRI_TRANSITIONS=1307} [2024-06-27 18:04:21,644 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 396 predicate places. [2024-06-27 18:04:21,645 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1307 transitions, 35172 flow [2024-06-27 18:04:21,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.380952380952381) internal successors, (155), 21 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:21,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:21,645 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 18:04:21,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:21,857 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,SelfDestructingSolverStorable16 [2024-06-27 18:04:21,859 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 18:04:21,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1030937604, now seen corresponding path program 14 times [2024-06-27 18:04:21,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:21,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723685742] [2024-06-27 18:04:21,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:21,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:21,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:21,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723685742] [2024-06-27 18:04:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723685742] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360910638] [2024-06-27 18:04:21,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:04:21,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:21,936 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 18:04:21,939 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 18:04:21,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:04:21,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:21,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:04:21,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:22,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:04:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360910638] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:22,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:22,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-27 18:04:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822227406] [2024-06-27 18:04:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:22,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:04:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:04:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:04:22,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:22,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1307 transitions, 35172 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:22,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:22,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:22,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:26,290 INFO L124 PetriNetUnfolderBase]: 5263/8749 cut-off events. [2024-06-27 18:04:26,290 INFO L125 PetriNetUnfolderBase]: For 523679/523679 co-relation queries the response was YES. [2024-06-27 18:04:26,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106800 conditions, 8749 events. 5263/8749 cut-off events. For 523679/523679 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 55949 event pairs, 71 based on Foata normal form. 75/8824 useless extension candidates. Maximal degree in co-relation 106524. Up to 3799 conditions per place. [2024-06-27 18:04:26,440 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 763 selfloop transitions, 775 changer transitions 1/1542 dead transitions. [2024-06-27 18:04:26,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1542 transitions, 43252 flow [2024-06-27 18:04:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:04:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:04:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 267 transitions. [2024-06-27 18:04:26,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107692307692308 [2024-06-27 18:04:26,441 INFO L175 Difference]: Start difference. First operand has 424 places, 1307 transitions, 35172 flow. Second operand 25 states and 267 transitions. [2024-06-27 18:04:26,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1542 transitions, 43252 flow [2024-06-27 18:04:30,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1542 transitions, 42962 flow, removed 100 selfloop flow, removed 8 redundant places. [2024-06-27 18:04:30,375 INFO L231 Difference]: Finished difference. Result has 449 places, 1385 transitions, 40060 flow [2024-06-27 18:04:30,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=34740, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=40060, PETRI_PLACES=449, PETRI_TRANSITIONS=1385} [2024-06-27 18:04:30,376 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 421 predicate places. [2024-06-27 18:04:30,376 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1385 transitions, 40060 flow [2024-06-27 18:04:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:30,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:30,376 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 18:04:30,387 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 18:04:30,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:30,586 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 18:04:30,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1841308272, now seen corresponding path program 15 times [2024-06-27 18:04:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:30,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696063460] [2024-06-27 18:04:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:30,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696063460] [2024-06-27 18:04:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696063460] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:30,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979421739] [2024-06-27 18:04:30,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:04:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:30,666 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 18:04:30,670 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 18:04:30,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:04:30,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:30,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:04:30,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:30,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:04:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979421739] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:30,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:30,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-06-27 18:04:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708824100] [2024-06-27 18:04:30,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:30,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 18:04:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 18:04:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-06-27 18:04:30,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:30,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1385 transitions, 40060 flow. Second operand has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:30,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:30,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:30,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:34,964 INFO L124 PetriNetUnfolderBase]: 5378/8902 cut-off events. [2024-06-27 18:04:34,964 INFO L125 PetriNetUnfolderBase]: For 622411/622411 co-relation queries the response was YES. [2024-06-27 18:04:35,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115286 conditions, 8902 events. 5378/8902 cut-off events. For 622411/622411 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 56349 event pairs, 250 based on Foata normal form. 8/8910 useless extension candidates. Maximal degree in co-relation 114572. Up to 7660 conditions per place. [2024-06-27 18:04:35,101 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1335 selfloop transitions, 154 changer transitions 2/1494 dead transitions. [2024-06-27 18:04:35,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1494 transitions, 45919 flow [2024-06-27 18:04:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:04:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:04:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 163 transitions. [2024-06-27 18:04:35,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41794871794871796 [2024-06-27 18:04:35,102 INFO L175 Difference]: Start difference. First operand has 449 places, 1385 transitions, 40060 flow. Second operand 15 states and 163 transitions. [2024-06-27 18:04:35,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1494 transitions, 45919 flow [2024-06-27 18:04:39,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1494 transitions, 45542 flow, removed 101 selfloop flow, removed 18 redundant places. [2024-06-27 18:04:39,349 INFO L231 Difference]: Finished difference. Result has 447 places, 1423 transitions, 41473 flow [2024-06-27 18:04:39,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=39685, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=41473, PETRI_PLACES=447, PETRI_TRANSITIONS=1423} [2024-06-27 18:04:39,351 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 419 predicate places. [2024-06-27 18:04:39,351 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1423 transitions, 41473 flow [2024-06-27 18:04:39,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:39,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:39,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:39,366 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 18:04:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:39,553 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 18:04:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash 308822128, now seen corresponding path program 16 times [2024-06-27 18:04:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915438805] [2024-06-27 18:04:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:39,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915438805] [2024-06-27 18:04:39,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915438805] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201533039] [2024-06-27 18:04:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:04:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:39,630 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 18:04:39,663 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 18:04:39,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:04:39,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:39,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 18:04:39,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:39,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:39,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201533039] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:39,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:39,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2024-06-27 18:04:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853320017] [2024-06-27 18:04:39,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:39,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:39,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-06-27 18:04:39,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1423 transitions, 41473 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:39,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:39,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-06-27 18:04:39,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,740 INFO L124 PetriNetUnfolderBase]: 7224/13027 cut-off events. [2024-06-27 18:04:45,741 INFO L125 PetriNetUnfolderBase]: For 824142/824856 co-relation queries the response was YES. [2024-06-27 18:04:45,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168227 conditions, 13027 events. 7224/13027 cut-off events. For 824142/824856 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 99742 event pairs, 314 based on Foata normal form. 133/12969 useless extension candidates. Maximal degree in co-relation 166945. Up to 4240 conditions per place. [2024-06-27 18:04:46,028 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 1358 selfloop transitions, 462 changer transitions 238/2414 dead transitions. [2024-06-27 18:04:46,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 2414 transitions, 74658 flow [2024-06-27 18:04:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 18:04:46,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-06-27 18:04:46,030 INFO L175 Difference]: Start difference. First operand has 447 places, 1423 transitions, 41473 flow. Second operand 5 states and 90 transitions. [2024-06-27 18:04:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 2414 transitions, 74658 flow [2024-06-27 18:04:54,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 2414 transitions, 74458 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-27 18:04:54,788 INFO L231 Difference]: Finished difference. Result has 443 places, 1727 transitions, 54723 flow [2024-06-27 18:04:54,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=41336, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=54723, PETRI_PLACES=443, PETRI_TRANSITIONS=1727} [2024-06-27 18:04:54,790 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 415 predicate places. [2024-06-27 18:04:54,790 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1727 transitions, 54723 flow [2024-06-27 18:04:54,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:54,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:54,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:54,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 18:04:54,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:54,996 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 18:04:54,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:54,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1823286366, now seen corresponding path program 17 times [2024-06-27 18:04:54,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:54,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272356541] [2024-06-27 18:04:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:54,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272356541] [2024-06-27 18:04:55,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272356541] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:04:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531625537] [2024-06-27 18:04:55,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:04:55,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:04:55,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:55,148 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 18:04:55,164 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 18:04:55,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-06-27 18:04:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:04:55,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:04:55,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:04:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:04:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531625537] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:04:55,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:04:55,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-06-27 18:04:55,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588735402] [2024-06-27 18:04:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:04:55,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 18:04:55,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 18:04:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:04:55,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:04:55,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1727 transitions, 54723 flow. Second operand has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:55,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:55,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:04:55,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:04,027 INFO L124 PetriNetUnfolderBase]: 9430/15632 cut-off events. [2024-06-27 18:05:04,028 INFO L125 PetriNetUnfolderBase]: For 1029673/1029673 co-relation queries the response was YES. [2024-06-27 18:05:04,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207829 conditions, 15632 events. 9430/15632 cut-off events. For 1029673/1029673 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 108436 event pairs, 199 based on Foata normal form. 90/15722 useless extension candidates. Maximal degree in co-relation 206486. Up to 7343 conditions per place. [2024-06-27 18:05:04,288 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 1070 selfloop transitions, 1019 changer transitions 104/2196 dead transitions. [2024-06-27 18:05:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 2196 transitions, 70098 flow [2024-06-27 18:05:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 212 transitions. [2024-06-27 18:05:04,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796380090497738 [2024-06-27 18:05:04,290 INFO L175 Difference]: Start difference. First operand has 443 places, 1727 transitions, 54723 flow. Second operand 17 states and 212 transitions. [2024-06-27 18:05:04,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 2196 transitions, 70098 flow [2024-06-27 18:05:14,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2196 transitions, 69778 flow, removed 154 selfloop flow, removed 2 redundant places. [2024-06-27 18:05:14,998 INFO L231 Difference]: Finished difference. Result has 462 places, 1831 transitions, 61695 flow [2024-06-27 18:05:14,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54400, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=61695, PETRI_PLACES=462, PETRI_TRANSITIONS=1831} [2024-06-27 18:05:14,999 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 434 predicate places. [2024-06-27 18:05:14,999 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1831 transitions, 61695 flow [2024-06-27 18:05:15,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.4) internal successors, (126), 15 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:15,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:15,000 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:15,011 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 18:05:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:15,200 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 18:05:15,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash 142860332, now seen corresponding path program 18 times [2024-06-27 18:05:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247026201] [2024-06-27 18:05:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:15,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247026201] [2024-06-27 18:05:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247026201] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:05:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638851943] [2024-06-27 18:05:15,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:05:15,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:05:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:05:15,353 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 18:05:15,354 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 18:05:15,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 18:05:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:05:15,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 18:05:15,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:05:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:15,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:05:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:15,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638851943] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:05:15,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:05:15,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2024-06-27 18:05:15,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606176514] [2024-06-27 18:05:15,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:05:15,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 18:05:15,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 18:05:15,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2024-06-27 18:05:15,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-06-27 18:05:15,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1831 transitions, 61695 flow. Second operand has 27 states, 27 states have (on average 7.444444444444445) internal successors, (201), 27 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:15,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:15,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-06-27 18:05:15,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:29,657 INFO L124 PetriNetUnfolderBase]: 13389/22379 cut-off events. [2024-06-27 18:05:29,657 INFO L125 PetriNetUnfolderBase]: For 1636294/1636294 co-relation queries the response was YES. [2024-06-27 18:05:30,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311976 conditions, 22379 events. 13389/22379 cut-off events. For 1636294/1636294 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 166131 event pairs, 34 based on Foata normal form. 220/22599 useless extension candidates. Maximal degree in co-relation 309926. Up to 4967 conditions per place. [2024-06-27 18:05:30,291 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 1118 selfloop transitions, 2957 changer transitions 283/4361 dead transitions. [2024-06-27 18:05:30,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 4361 transitions, 141245 flow [2024-06-27 18:05:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-06-27 18:05:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-06-27 18:05:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 841 transitions. [2024-06-27 18:05:30,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39446529080675424 [2024-06-27 18:05:30,293 INFO L175 Difference]: Start difference. First operand has 462 places, 1831 transitions, 61695 flow. Second operand 82 states and 841 transitions. [2024-06-27 18:05:30,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 4361 transitions, 141245 flow