./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.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-more-buffer-mult2.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-more-buffer-mult2.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/popl20-more-buffer-mult2.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 18:03:05,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:03:05,556 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:03:05,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:03:05,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:03:05,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:03:05,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:03:05,582 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:03:05,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:03:05,587 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:03:05,588 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:03:05,588 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:03:05,589 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:03:05,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:03:05,590 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:03:05,590 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:03:05,590 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:03:05,591 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:03:05,591 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:03:05,591 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:03:05,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:03:05,592 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:03:05,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:03:05,592 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:03:05,592 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:03:05,592 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:03:05,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:03:05,593 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:03:05,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:03:05,593 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:03:05,594 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:03:05,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:03:05,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:05,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:03:05,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:03:05,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:03:05,595 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:03:05,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:03:05,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:03:05,596 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:03:05,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:03:05,596 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:03:05,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:03:05,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:03:05,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:03:05,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:03:05,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:03:05,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:03:05,841 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:03:05,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2024-06-27 18:03:07,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:03:07,278 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:03:07,278 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2024-06-27 18:03:07,286 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8adea64d/c416ceb99e4f4221a4f5f9661c0d1eef/FLAGa462463a1 [2024-06-27 18:03:07,299 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8adea64d/c416ceb99e4f4221a4f5f9661c0d1eef [2024-06-27 18:03:07,302 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:03:07,302 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:03:07,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/popl20-more-buffer-mult2.wvr.yml/witness.yml [2024-06-27 18:03:07,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:03:07,375 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:03:07,376 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:07,376 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:03:07,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:03:07,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:07" (1/2) ... [2024-06-27 18:03:07,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3e6e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:07, skipping insertion in model container [2024-06-27 18:03:07,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:03:07" (1/2) ... [2024-06-27 18:03:07,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a6575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:03:07, skipping insertion in model container [2024-06-27 18:03:07,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:07" (2/2) ... [2024-06-27 18:03:07,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3e6e99 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07, skipping insertion in model container [2024-06-27 18:03:07,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:07" (2/2) ... [2024-06-27 18:03:07,386 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:03:07,417 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:03:07,418 INFO L97 edCorrectnessWitness]: Location invariant before [L142-L142] (! multithreaded || 0 <= i) && (! multithreaded || 0 <= j) [2024-06-27 18:03:07,418 INFO L97 edCorrectnessWitness]: Location invariant before [L141-L141] (! multithreaded || 0 <= i) && (! multithreaded || 0 <= j) [2024-06-27 18:03:07,419 INFO L97 edCorrectnessWitness]: Location invariant before [L139-L139] (! multithreaded || 0 <= i) && (! multithreaded || 0 <= j) [2024-06-27 18:03:07,419 INFO L97 edCorrectnessWitness]: Location invariant before [L140-L140] (! multithreaded || 0 <= i) && (! multithreaded || 0 <= j) [2024-06-27 18:03:07,419 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:03:07,420 INFO L106 edCorrectnessWitness]: ghost_update [L138-L138] multithreaded = 1; [2024-06-27 18:03:07,445 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:03:07,590 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-more-buffer-mult2.wvr.c[4151,4164] [2024-06-27 18:03:07,599 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:07,606 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:03:07,697 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-more-buffer-mult2.wvr.c[4151,4164] [2024-06-27 18:03:07,703 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:03:07,720 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:03:07,722 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07 WrapperNode [2024-06-27 18:03:07,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:03:07,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:07,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:03:07,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:03:07,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,781 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 299 [2024-06-27 18:03:07,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:03:07,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:03:07,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:03:07,784 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:03:07,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,805 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,825 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 18:03:07,826 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,826 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,838 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,840 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,841 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:03:07,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:03:07,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:03:07,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:03:07,845 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (1/1) ... [2024-06-27 18:03:07,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:03:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:07,867 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 18:03:07,874 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 18:03:07,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:03:07,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:03:07,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:03:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:03:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:03:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:03:07,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:03:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:03:07,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:03:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 18:03:07,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 18:03:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 18:03:07,900 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 18:03:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:03:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:03:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:03:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:03:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 18:03:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:03:07,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:03:07,904 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 18:03:07,998 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:03:07,999 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:03:08,321 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:03:08,322 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:03:08,588 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:03:08,589 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 18:03:08,590 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:08 BoogieIcfgContainer [2024-06-27 18:03:08,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:03:08,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:03:08,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:03:08,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:03:08,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:03:07" (1/4) ... [2024-06-27 18:03:08,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bfb973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:03:08, skipping insertion in model container [2024-06-27 18:03:08,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:03:07" (2/4) ... [2024-06-27 18:03:08,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bfb973 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:03:08, skipping insertion in model container [2024-06-27 18:03:08,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:03:07" (3/4) ... [2024-06-27 18:03:08,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42bfb973 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:03:08, skipping insertion in model container [2024-06-27 18:03:08,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:03:08" (4/4) ... [2024-06-27 18:03:08,600 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2024-06-27 18:03:08,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:03:08,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:03:08,617 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:03:08,673 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 18:03:08,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 57 transitions, 142 flow [2024-06-27 18:03:08,741 INFO L124 PetriNetUnfolderBase]: 6/53 cut-off events. [2024-06-27 18:03:08,742 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 18:03:08,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 53 events. 6/53 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:03:08,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 57 transitions, 142 flow [2024-06-27 18:03:08,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 52 transitions, 128 flow [2024-06-27 18:03:08,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:03:08,770 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;@67f8df92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:03:08,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:03:08,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:03:08,775 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2024-06-27 18:03:08,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:03:08,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:08,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:08,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:08,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -472312563, now seen corresponding path program 1 times [2024-06-27 18:03:08,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:08,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915366167] [2024-06-27 18:03:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:08,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:09,194 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 18:03:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915366167] [2024-06-27 18:03:09,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915366167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:09,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:09,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:03:09,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012074129] [2024-06-27 18:03:09,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:09,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:09,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:09,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:03:09,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:09,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:09,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:03:09,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:09,765 INFO L124 PetriNetUnfolderBase]: 1639/2613 cut-off events. [2024-06-27 18:03:09,766 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-06-27 18:03:09,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4973 conditions, 2613 events. 1639/2613 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15298 event pairs, 308 based on Foata normal form. 36/2498 useless extension candidates. Maximal degree in co-relation 4431. Up to 1760 conditions per place. [2024-06-27 18:03:09,810 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 53 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2024-06-27 18:03:09,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 307 flow [2024-06-27 18:03:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-06-27 18:03:09,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7543859649122807 [2024-06-27 18:03:09,824 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 128 flow. Second operand 3 states and 129 transitions. [2024-06-27 18:03:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 307 flow [2024-06-27 18:03:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 277 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:03:09,836 INFO L231 Difference]: Finished difference. Result has 54 places, 54 transitions, 137 flow [2024-06-27 18:03:09,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=54, PETRI_TRANSITIONS=54} [2024-06-27 18:03:09,842 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -5 predicate places. [2024-06-27 18:03:09,842 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 54 transitions, 137 flow [2024-06-27 18:03:09,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:09,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:09,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:09,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:03:09,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:09,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2061913834, now seen corresponding path program 1 times [2024-06-27 18:03:09,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:09,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864974616] [2024-06-27 18:03:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:09,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:09,962 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 18:03:09,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:09,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864974616] [2024-06-27 18:03:09,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864974616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:09,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:09,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:09,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673555746] [2024-06-27 18:03:09,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:09,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:09,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:09,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:03:09,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 54 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:09,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:09,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:03:09,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:10,360 INFO L124 PetriNetUnfolderBase]: 1659/2689 cut-off events. [2024-06-27 18:03:10,360 INFO L125 PetriNetUnfolderBase]: For 534/612 co-relation queries the response was YES. [2024-06-27 18:03:10,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5791 conditions, 2689 events. 1659/2689 cut-off events. For 534/612 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16471 event pairs, 294 based on Foata normal form. 54/2653 useless extension candidates. Maximal degree in co-relation 1073. Up to 1297 conditions per place. [2024-06-27 18:03:10,377 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 71 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2024-06-27 18:03:10,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 382 flow [2024-06-27 18:03:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2024-06-27 18:03:10,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-27 18:03:10,385 INFO L175 Difference]: Start difference. First operand has 54 places, 54 transitions, 137 flow. Second operand 4 states and 171 transitions. [2024-06-27 18:03:10,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 382 flow [2024-06-27 18:03:10,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:10,389 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 152 flow [2024-06-27 18:03:10,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-27 18:03:10,394 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2024-06-27 18:03:10,394 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 152 flow [2024-06-27 18:03:10,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:10,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:10,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:10,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:03:10,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:10,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -770728714, now seen corresponding path program 1 times [2024-06-27 18:03:10,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:10,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768554367] [2024-06-27 18:03:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:10,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:10,483 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 18:03:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:10,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768554367] [2024-06-27 18:03:10,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768554367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:10,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:10,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087291061] [2024-06-27 18:03:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:10,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:10,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:03:10,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:10,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:03:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:10,780 INFO L124 PetriNetUnfolderBase]: 1711/2866 cut-off events. [2024-06-27 18:03:10,780 INFO L125 PetriNetUnfolderBase]: For 1553/1657 co-relation queries the response was YES. [2024-06-27 18:03:10,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6424 conditions, 2866 events. 1711/2866 cut-off events. For 1553/1657 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18586 event pairs, 385 based on Foata normal form. 52/2840 useless extension candidates. Maximal degree in co-relation 2385. Up to 1412 conditions per place. [2024-06-27 18:03:10,796 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 72 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-06-27 18:03:10,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 95 transitions, 405 flow [2024-06-27 18:03:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2024-06-27 18:03:10,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7456140350877193 [2024-06-27 18:03:10,797 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 152 flow. Second operand 4 states and 170 transitions. [2024-06-27 18:03:10,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 95 transitions, 405 flow [2024-06-27 18:03:10,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 399 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:10,800 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 168 flow [2024-06-27 18:03:10,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-27 18:03:10,801 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-06-27 18:03:10,801 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 168 flow [2024-06-27 18:03:10,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:10,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:10,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:10,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:03:10,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:10,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1471774125, now seen corresponding path program 1 times [2024-06-27 18:03:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:10,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538656112] [2024-06-27 18:03:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:10,886 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 18:03:10,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:10,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538656112] [2024-06-27 18:03:10,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538656112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:10,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:10,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:10,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672947838] [2024-06-27 18:03:10,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:10,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:10,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:03:10,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:10,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:10,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:03:10,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:11,362 INFO L124 PetriNetUnfolderBase]: 2082/3482 cut-off events. [2024-06-27 18:03:11,362 INFO L125 PetriNetUnfolderBase]: For 3094/3106 co-relation queries the response was YES. [2024-06-27 18:03:11,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8053 conditions, 3482 events. 2082/3482 cut-off events. For 3094/3106 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23769 event pairs, 1578 based on Foata normal form. 159/3404 useless extension candidates. Maximal degree in co-relation 4363. Up to 2211 conditions per place. [2024-06-27 18:03:11,390 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 56 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-06-27 18:03:11,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 359 flow [2024-06-27 18:03:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-06-27 18:03:11,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2024-06-27 18:03:11,392 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 168 flow. Second operand 5 states and 192 transitions. [2024-06-27 18:03:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 359 flow [2024-06-27 18:03:11,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 82 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:11,396 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 194 flow [2024-06-27 18:03:11,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-27 18:03:11,398 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2024-06-27 18:03:11,398 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 194 flow [2024-06-27 18:03:11,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:11,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:11,399 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 18:03:11,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:03:11,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:11,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1300422378, now seen corresponding path program 1 times [2024-06-27 18:03:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:11,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412343697] [2024-06-27 18:03:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412343697] [2024-06-27 18:03:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412343697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:11,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:03:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205223000] [2024-06-27 18:03:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:03:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:03:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:03:11,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:03:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:03:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:11,915 INFO L124 PetriNetUnfolderBase]: 2676/4645 cut-off events. [2024-06-27 18:03:11,915 INFO L125 PetriNetUnfolderBase]: For 3688/3700 co-relation queries the response was YES. [2024-06-27 18:03:11,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 4645 events. 2676/4645 cut-off events. For 3688/3700 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34427 event pairs, 2113 based on Foata normal form. 171/4507 useless extension candidates. Maximal degree in co-relation 8550. Up to 2849 conditions per place. [2024-06-27 18:03:11,944 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 57 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2024-06-27 18:03:11,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 396 flow [2024-06-27 18:03:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:03:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:03:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-06-27 18:03:11,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7149122807017544 [2024-06-27 18:03:11,946 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 194 flow. Second operand 4 states and 163 transitions. [2024-06-27 18:03:11,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 396 flow [2024-06-27 18:03:11,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:11,950 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 231 flow [2024-06-27 18:03:11,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-06-27 18:03:11,951 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2024-06-27 18:03:11,951 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 231 flow [2024-06-27 18:03:11,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:11,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:11,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:11,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:03:11,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:11,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1626358925, now seen corresponding path program 1 times [2024-06-27 18:03:11,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387153186] [2024-06-27 18:03:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:11,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:12,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387153186] [2024-06-27 18:03:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387153186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:12,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:12,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170878160] [2024-06-27 18:03:12,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:12,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:12,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:03:12,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:12,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:12,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:03:12,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:12,790 INFO L124 PetriNetUnfolderBase]: 3104/5534 cut-off events. [2024-06-27 18:03:12,791 INFO L125 PetriNetUnfolderBase]: For 4161/4265 co-relation queries the response was YES. [2024-06-27 18:03:12,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 5534 events. 3104/5534 cut-off events. For 4161/4265 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42017 event pairs, 838 based on Foata normal form. 52/5422 useless extension candidates. Maximal degree in co-relation 10762. Up to 1706 conditions per place. [2024-06-27 18:03:12,827 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 98 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-06-27 18:03:12,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 121 transitions, 598 flow [2024-06-27 18:03:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 213 transitions. [2024-06-27 18:03:12,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7473684210526316 [2024-06-27 18:03:12,829 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 231 flow. Second operand 5 states and 213 transitions. [2024-06-27 18:03:12,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 121 transitions, 598 flow [2024-06-27 18:03:12,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 593 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:12,835 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 241 flow [2024-06-27 18:03:12,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-06-27 18:03:12,835 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2024-06-27 18:03:12,835 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 241 flow [2024-06-27 18:03:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:12,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:12,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:12,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:03:12,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:12,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash -189503961, now seen corresponding path program 2 times [2024-06-27 18:03:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682337643] [2024-06-27 18:03:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:12,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:12,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682337643] [2024-06-27 18:03:12,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682337643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:12,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:12,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:03:12,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866539806] [2024-06-27 18:03:12,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:12,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:03:12,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:03:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:03:12,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-06-27 18:03:12,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-06-27 18:03:12,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:13,512 INFO L124 PetriNetUnfolderBase]: 2944/5302 cut-off events. [2024-06-27 18:03:13,512 INFO L125 PetriNetUnfolderBase]: For 5352/5352 co-relation queries the response was YES. [2024-06-27 18:03:13,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12624 conditions, 5302 events. 2944/5302 cut-off events. For 5352/5352 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40390 event pairs, 795 based on Foata normal form. 52/5215 useless extension candidates. Maximal degree in co-relation 10662. Up to 1549 conditions per place. [2024-06-27 18:03:13,556 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 95 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2024-06-27 18:03:13,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 572 flow [2024-06-27 18:03:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:03:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:03:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 210 transitions. [2024-06-27 18:03:13,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7368421052631579 [2024-06-27 18:03:13,562 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 241 flow. Second operand 5 states and 210 transitions. [2024-06-27 18:03:13,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 572 flow [2024-06-27 18:03:13,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 118 transitions, 564 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:03:13,586 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 211 flow [2024-06-27 18:03:13,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-06-27 18:03:13,587 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2024-06-27 18:03:13,587 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 211 flow [2024-06-27 18:03:13,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:13,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:13,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:03:13,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:13,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:13,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1496392241, now seen corresponding path program 1 times [2024-06-27 18:03:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:13,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107028596] [2024-06-27 18:03:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:13,622 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 18:03:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107028596] [2024-06-27 18:03:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107028596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:13,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109854269] [2024-06-27 18:03:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:13,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:03:13,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:13,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:13,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:03:13,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:14,275 INFO L124 PetriNetUnfolderBase]: 4652/7874 cut-off events. [2024-06-27 18:03:14,275 INFO L125 PetriNetUnfolderBase]: For 7188/7188 co-relation queries the response was YES. [2024-06-27 18:03:14,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18694 conditions, 7874 events. 4652/7874 cut-off events. For 7188/7188 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 57342 event pairs, 1374 based on Foata normal form. 10/7574 useless extension candidates. Maximal degree in co-relation 15808. Up to 3807 conditions per place. [2024-06-27 18:03:14,327 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 54 selfloop transitions, 3 changer transitions 2/78 dead transitions. [2024-06-27 18:03:14,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 78 transitions, 417 flow [2024-06-27 18:03:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-06-27 18:03:14,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7426900584795322 [2024-06-27 18:03:14,329 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 211 flow. Second operand 3 states and 127 transitions. [2024-06-27 18:03:14,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 78 transitions, 417 flow [2024-06-27 18:03:14,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 405 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:14,333 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 217 flow [2024-06-27 18:03:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-06-27 18:03:14,334 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2024-06-27 18:03:14,334 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 217 flow [2024-06-27 18:03:14,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:14,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:14,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:03:14,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:14,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash -608280127, now seen corresponding path program 1 times [2024-06-27 18:03:14,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:14,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427052865] [2024-06-27 18:03:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:14,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427052865] [2024-06-27 18:03:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427052865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:14,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:14,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486342882] [2024-06-27 18:03:14,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:14,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:03:14,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:14,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:14,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:03:14,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:14,817 INFO L124 PetriNetUnfolderBase]: 3702/6163 cut-off events. [2024-06-27 18:03:14,817 INFO L125 PetriNetUnfolderBase]: For 6296/6296 co-relation queries the response was YES. [2024-06-27 18:03:14,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15719 conditions, 6163 events. 3702/6163 cut-off events. For 6296/6296 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42969 event pairs, 1360 based on Foata normal form. 122/6076 useless extension candidates. Maximal degree in co-relation 13273. Up to 3214 conditions per place. [2024-06-27 18:03:14,851 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 59 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2024-06-27 18:03:14,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 81 transitions, 407 flow [2024-06-27 18:03:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-06-27 18:03:14,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-06-27 18:03:14,852 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 217 flow. Second operand 3 states and 133 transitions. [2024-06-27 18:03:14,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 81 transitions, 407 flow [2024-06-27 18:03:14,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 81 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:14,860 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 227 flow [2024-06-27 18:03:14,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-06-27 18:03:14,860 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-06-27 18:03:14,860 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 227 flow [2024-06-27 18:03:14,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:14,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:03:14,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:14,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1628504525, now seen corresponding path program 1 times [2024-06-27 18:03:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821447372] [2024-06-27 18:03:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821447372] [2024-06-27 18:03:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821447372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:03:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066878540] [2024-06-27 18:03:14,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:03:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:03:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:03:14,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 57 [2024-06-27 18:03:14,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:14,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:14,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 57 [2024-06-27 18:03:14,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:15,308 INFO L124 PetriNetUnfolderBase]: 3188/5424 cut-off events. [2024-06-27 18:03:15,309 INFO L125 PetriNetUnfolderBase]: For 6580/6580 co-relation queries the response was YES. [2024-06-27 18:03:15,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13924 conditions, 5424 events. 3188/5424 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 37582 event pairs, 1175 based on Foata normal form. 44/5277 useless extension candidates. Maximal degree in co-relation 12046. Up to 2723 conditions per place. [2024-06-27 18:03:15,336 INFO L140 encePairwiseOnDemand]: 54/57 looper letters, 56 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-06-27 18:03:15,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 78 transitions, 407 flow [2024-06-27 18:03:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:03:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:03:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-06-27 18:03:15,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7602339181286549 [2024-06-27 18:03:15,338 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 227 flow. Second operand 3 states and 130 transitions. [2024-06-27 18:03:15,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 78 transitions, 407 flow [2024-06-27 18:03:15,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 393 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:15,344 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 230 flow [2024-06-27 18:03:15,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-27 18:03:15,346 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 12 predicate places. [2024-06-27 18:03:15,346 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 230 flow [2024-06-27 18:03:15,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:15,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:15,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:15,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:03:15,347 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:15,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -396239142, now seen corresponding path program 1 times [2024-06-27 18:03:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:15,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822839988] [2024-06-27 18:03:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:15,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822839988] [2024-06-27 18:03:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822839988] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173070458] [2024-06-27 18:03:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:15,717 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 18:03:15,726 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 18:03:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:15,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 18:03:15,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:15,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:16,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173070458] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:16,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:16,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 14 [2024-06-27 18:03:16,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552927130] [2024-06-27 18:03:16,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:16,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:03:16,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:03:16,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-06-27 18:03:16,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 18:03:16,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:16,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:16,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 18:03:16,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:19,956 INFO L124 PetriNetUnfolderBase]: 30558/42500 cut-off events. [2024-06-27 18:03:19,956 INFO L125 PetriNetUnfolderBase]: For 30600/30982 co-relation queries the response was YES. [2024-06-27 18:03:20,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107021 conditions, 42500 events. 30558/42500 cut-off events. For 30600/30982 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 277778 event pairs, 1387 based on Foata normal form. 40/35402 useless extension candidates. Maximal degree in co-relation 92286. Up to 5380 conditions per place. [2024-06-27 18:03:20,351 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 361 selfloop transitions, 53 changer transitions 5/429 dead transitions. [2024-06-27 18:03:20,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 429 transitions, 2165 flow [2024-06-27 18:03:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 18:03:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 18:03:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 813 transitions. [2024-06-27 18:03:20,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.620137299771167 [2024-06-27 18:03:20,359 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 230 flow. Second operand 23 states and 813 transitions. [2024-06-27 18:03:20,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 429 transitions, 2165 flow [2024-06-27 18:03:20,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 429 transitions, 2105 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:20,400 INFO L231 Difference]: Finished difference. Result has 110 places, 109 transitions, 648 flow [2024-06-27 18:03:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=648, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2024-06-27 18:03:20,401 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 51 predicate places. [2024-06-27 18:03:20,401 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 648 flow [2024-06-27 18:03:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:20,429 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 18:03:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 18:03:20,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 421445952, now seen corresponding path program 2 times [2024-06-27 18:03:20,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:20,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377506074] [2024-06-27 18:03:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:21,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377506074] [2024-06-27 18:03:21,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377506074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:21,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:21,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:03:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205509987] [2024-06-27 18:03:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:21,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:21,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:03:21,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 18:03:21,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 648 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:21,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:21,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 18:03:21,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:24,483 INFO L124 PetriNetUnfolderBase]: 19528/30570 cut-off events. [2024-06-27 18:03:24,484 INFO L125 PetriNetUnfolderBase]: For 121186/121627 co-relation queries the response was YES. [2024-06-27 18:03:24,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114949 conditions, 30570 events. 19528/30570 cut-off events. For 121186/121627 co-relation queries the response was YES. Maximal size of possible extension queue 1474. Compared 237741 event pairs, 3162 based on Foata normal form. 178/30352 useless extension candidates. Maximal degree in co-relation 108925. Up to 20776 conditions per place. [2024-06-27 18:03:24,768 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 141 selfloop transitions, 30 changer transitions 7/209 dead transitions. [2024-06-27 18:03:24,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 209 transitions, 1564 flow [2024-06-27 18:03:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:03:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:03:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 269 transitions. [2024-06-27 18:03:24,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5899122807017544 [2024-06-27 18:03:24,770 INFO L175 Difference]: Start difference. First operand has 110 places, 109 transitions, 648 flow. Second operand 8 states and 269 transitions. [2024-06-27 18:03:24,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 209 transitions, 1564 flow [2024-06-27 18:03:26,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 209 transitions, 1488 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:26,087 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 929 flow [2024-06-27 18:03:26,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-06-27 18:03:26,087 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 60 predicate places. [2024-06-27 18:03:26,088 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 929 flow [2024-06-27 18:03:26,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:26,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:26,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:03:26,088 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:26,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1428193782, now seen corresponding path program 3 times [2024-06-27 18:03:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107072718] [2024-06-27 18:03:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107072718] [2024-06-27 18:03:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107072718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:26,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:26,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:03:26,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107651596] [2024-06-27 18:03:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:03:26,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 18:03:26,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 929 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:26,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:26,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 18:03:26,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:30,410 INFO L124 PetriNetUnfolderBase]: 20626/31389 cut-off events. [2024-06-27 18:03:30,410 INFO L125 PetriNetUnfolderBase]: For 154623/155794 co-relation queries the response was YES. [2024-06-27 18:03:30,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131800 conditions, 31389 events. 20626/31389 cut-off events. For 154623/155794 co-relation queries the response was YES. Maximal size of possible extension queue 1520. Compared 237125 event pairs, 4647 based on Foata normal form. 183/30943 useless extension candidates. Maximal degree in co-relation 125286. Up to 23553 conditions per place. [2024-06-27 18:03:30,859 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 126 selfloop transitions, 48 changer transitions 12/217 dead transitions. [2024-06-27 18:03:30,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 217 transitions, 1927 flow [2024-06-27 18:03:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:03:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:03:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 18:03:30,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.568922305764411 [2024-06-27 18:03:30,861 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 929 flow. Second operand 7 states and 227 transitions. [2024-06-27 18:03:30,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 217 transitions, 1927 flow [2024-06-27 18:03:32,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 217 transitions, 1899 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-27 18:03:32,566 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1442 flow [2024-06-27 18:03:32,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1442, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2024-06-27 18:03:32,567 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 71 predicate places. [2024-06-27 18:03:32,567 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1442 flow [2024-06-27 18:03:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:32,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:32,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:03:32,568 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:32,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash 109882980, now seen corresponding path program 4 times [2024-06-27 18:03:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:32,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771103269] [2024-06-27 18:03:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771103269] [2024-06-27 18:03:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771103269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:32,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:32,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:03:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570801723] [2024-06-27 18:03:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:03:32,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-06-27 18:03:32,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1442 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:32,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:32,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-06-27 18:03:32,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:38,153 INFO L124 PetriNetUnfolderBase]: 32169/48488 cut-off events. [2024-06-27 18:03:38,153 INFO L125 PetriNetUnfolderBase]: For 223525/224885 co-relation queries the response was YES. [2024-06-27 18:03:38,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201182 conditions, 48488 events. 32169/48488 cut-off events. For 223525/224885 co-relation queries the response was YES. Maximal size of possible extension queue 2352. Compared 373088 event pairs, 6312 based on Foata normal form. 1253/48921 useless extension candidates. Maximal degree in co-relation 191863. Up to 32525 conditions per place. [2024-06-27 18:03:38,838 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 173 selfloop transitions, 70 changer transitions 6/265 dead transitions. [2024-06-27 18:03:38,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 265 transitions, 2637 flow [2024-06-27 18:03:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:03:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:03:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2024-06-27 18:03:38,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 18:03:38,840 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1442 flow. Second operand 7 states and 247 transitions. [2024-06-27 18:03:38,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 265 transitions, 2637 flow [2024-06-27 18:03:41,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 265 transitions, 2577 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:03:41,994 INFO L231 Difference]: Finished difference. Result has 139 places, 181 transitions, 1919 flow [2024-06-27 18:03:41,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1919, PETRI_PLACES=139, PETRI_TRANSITIONS=181} [2024-06-27 18:03:41,994 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 80 predicate places. [2024-06-27 18:03:41,994 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 181 transitions, 1919 flow [2024-06-27 18:03:41,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:41,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:41,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:41,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:03:41,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:41,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1751164954, now seen corresponding path program 5 times [2024-06-27 18:03:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:41,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471792473] [2024-06-27 18:03:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 18:03:42,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:42,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471792473] [2024-06-27 18:03:42,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471792473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:42,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:42,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:03:42,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751803879] [2024-06-27 18:03:42,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:42,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:42,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:03:42,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 18:03:42,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 181 transitions, 1919 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:42,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:42,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 18:03:42,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:48,099 INFO L124 PetriNetUnfolderBase]: 29799/47239 cut-off events. [2024-06-27 18:03:48,100 INFO L125 PetriNetUnfolderBase]: For 293862/296278 co-relation queries the response was YES. [2024-06-27 18:03:48,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211401 conditions, 47239 events. 29799/47239 cut-off events. For 293862/296278 co-relation queries the response was YES. Maximal size of possible extension queue 2359. Compared 396549 event pairs, 6114 based on Foata normal form. 1339/47710 useless extension candidates. Maximal degree in co-relation 201147. Up to 31534 conditions per place. [2024-06-27 18:03:48,758 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 186 selfloop transitions, 106 changer transitions 21/345 dead transitions. [2024-06-27 18:03:48,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 345 transitions, 4022 flow [2024-06-27 18:03:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:03:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:03:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 315 transitions. [2024-06-27 18:03:48,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2024-06-27 18:03:48,762 INFO L175 Difference]: Start difference. First operand has 139 places, 181 transitions, 1919 flow. Second operand 9 states and 315 transitions. [2024-06-27 18:03:48,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 345 transitions, 4022 flow [2024-06-27 18:03:53,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 345 transitions, 3934 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:03:53,037 INFO L231 Difference]: Finished difference. Result has 150 places, 225 transitions, 2974 flow [2024-06-27 18:03:53,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2974, PETRI_PLACES=150, PETRI_TRANSITIONS=225} [2024-06-27 18:03:53,039 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 91 predicate places. [2024-06-27 18:03:53,039 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 225 transitions, 2974 flow [2024-06-27 18:03:53,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:53,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:53,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:53,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:03:53,048 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:03:53,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1847001564, now seen corresponding path program 6 times [2024-06-27 18:03:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:53,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848365297] [2024-06-27 18:03:53,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:53,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848365297] [2024-06-27 18:03:53,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848365297] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468152496] [2024-06-27 18:03:53,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 18:03:53,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:53,438 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 18:03:53,492 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 18:03:53,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 18:03:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:53,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 18:03:53,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:03:53,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:03:53,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468152496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:53,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:03:53,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-06-27 18:03:53,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019536757] [2024-06-27 18:03:53,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:53,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:03:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:03:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:03:53,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 18:03:53,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 225 transitions, 2974 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:53,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:53,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 18:03:53,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:03,540 INFO L124 PetriNetUnfolderBase]: 44669/71104 cut-off events. [2024-06-27 18:04:03,540 INFO L125 PetriNetUnfolderBase]: For 619818/627193 co-relation queries the response was YES. [2024-06-27 18:04:04,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337889 conditions, 71104 events. 44669/71104 cut-off events. For 619818/627193 co-relation queries the response was YES. Maximal size of possible extension queue 3407. Compared 626810 event pairs, 7091 based on Foata normal form. 3030/72373 useless extension candidates. Maximal degree in co-relation 326143. Up to 38026 conditions per place. [2024-06-27 18:04:04,667 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 231 selfloop transitions, 263 changer transitions 37/581 dead transitions. [2024-06-27 18:04:04,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 581 transitions, 8886 flow [2024-06-27 18:04:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:04:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:04:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 418 transitions. [2024-06-27 18:04:04,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-27 18:04:04,669 INFO L175 Difference]: Start difference. First operand has 150 places, 225 transitions, 2974 flow. Second operand 13 states and 418 transitions. [2024-06-27 18:04:04,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 581 transitions, 8886 flow