./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/parallel-lamport.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/parallel-lamport.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/parallel-lamport.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 [2024-06-28 01:06:48,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:06:48,747 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:06:48,750 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:06:48,750 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:06:48,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:06:48,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:06:48,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:06:48,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:06:48,765 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:06:48,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:06:48,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:06:48,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:06:48,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:06:48,767 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:06:48,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:06:48,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:06:48,767 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:06:48,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:06:48,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:06:48,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:06:48,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:06:48,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:06:48,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:06:48,769 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:06:48,770 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:06:48,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:06:48,770 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:06:48,770 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:06:48,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:06:48,771 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:06:48,771 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:06:48,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:06:48,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:06:48,781 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:06:48,782 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:06:48,782 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:06:48,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:06:48,782 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:06:48,782 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:06:48,783 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:06:48,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:06:48,783 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:06:48,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:06:48,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:06:48,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:06:48,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:06:48,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:06:48,976 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:06:48,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2024-06-28 01:06:50,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:06:50,305 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:06:50,307 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-lamport.wvr.c [2024-06-28 01:06:50,318 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9347ca1b6/e8f4c11b74014e509a0d5179537b9eba/FLAG57fb1c60d [2024-06-28 01:06:50,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9347ca1b6/e8f4c11b74014e509a0d5179537b9eba [2024-06-28 01:06:50,334 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:06:50,335 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:06:50,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/parallel-lamport.wvr.yml/witness.yml [2024-06-28 01:06:50,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:06:50,422 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:06:50,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:06:50,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:06:50,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:06:50,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:06:50" (1/2) ... [2024-06-28 01:06:50,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d92944c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:50, skipping insertion in model container [2024-06-28 01:06:50,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:06:50" (1/2) ... [2024-06-28 01:06:50,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ff8dca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:50, skipping insertion in model container [2024-06-28 01:06:50,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:50" (2/2) ... [2024-06-28 01:06:50,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d92944c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50, skipping insertion in model container [2024-06-28 01:06:50,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:50" (2/2) ... [2024-06-28 01:06:50,431 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:06:50,447 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:06:50,448 INFO L97 edCorrectnessWitness]: Location invariant before [L155-L155] ((! multithreaded || -2147483647 <= n1) && (! multithreaded || -2147483647 <= n2)) && (! multithreaded || (-2147483647 <= n1 && -2147483647 <= n2)) [2024-06-28 01:06:50,448 INFO L97 edCorrectnessWitness]: Location invariant before [L156-L156] ((! multithreaded || -2147483647 <= n1) && (! multithreaded || -2147483647 <= n2)) && (! multithreaded || (-2147483647 <= n1 && -2147483647 <= n2)) [2024-06-28 01:06:50,448 INFO L97 edCorrectnessWitness]: Location invariant before [L154-L154] ((! multithreaded || -2147483647 <= n1) && (! multithreaded || -2147483647 <= n2)) && (! multithreaded || (-2147483647 <= n1 && -2147483647 <= n2)) [2024-06-28 01:06:50,449 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:06:50,451 INFO L106 edCorrectnessWitness]: ghost_update [L153-L153] multithreaded = 1; [2024-06-28 01:06:50,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:06:50,610 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/parallel-lamport.wvr.c[4249,4262] [2024-06-28 01:06:50,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:06:50,629 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:06:50,677 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/parallel-lamport.wvr.c[4249,4262] [2024-06-28 01:06:50,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:06:50,693 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:06:50,693 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50 WrapperNode [2024-06-28 01:06:50,693 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:06:50,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:06:50,694 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:06:50,694 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:06:50,703 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 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,710 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 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,730 INFO L138 Inliner]: procedures = 24, calls = 74, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 234 [2024-06-28 01:06:50,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:06:50,731 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:06:50,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:06:50,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:06:50,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,742 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,765 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-28 01:06:50,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,772 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,776 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:06:50,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:06:50,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:06:50,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:06:50,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (1/1) ... [2024-06-28 01:06:50,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:06:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:50,819 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) [2024-06-28 01:06:50,824 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 [2024-06-28 01:06:50,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:06:50,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 01:06:50,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 01:06:50,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 01:06:50,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 01:06:50,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-28 01:06:50,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-28 01:06:50,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:06:50,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:06:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:06:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:06:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:06:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:06:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-28 01:06:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:06:50,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:06:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:06:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:06:50,860 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:06:50,944 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:06:50,945 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:06:51,182 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:06:51,182 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:06:51,414 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:06:51,415 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-06-28 01:06:51,415 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:06:51 BoogieIcfgContainer [2024-06-28 01:06:51,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:06:51,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:06:51,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:06:51,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:06:51,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:06:50" (1/4) ... [2024-06-28 01:06:51,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253dd56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:06:51, skipping insertion in model container [2024-06-28 01:06:51,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:50" (2/4) ... [2024-06-28 01:06:51,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253dd56a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:06:51, skipping insertion in model container [2024-06-28 01:06:51,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:50" (3/4) ... [2024-06-28 01:06:51,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253dd56a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:06:51, skipping insertion in model container [2024-06-28 01:06:51,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:06:51" (4/4) ... [2024-06-28 01:06:51,425 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2024-06-28 01:06:51,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:06:51,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 01:06:51,445 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:06:51,494 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-28 01:06:51,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 54 transitions, 129 flow [2024-06-28 01:06:51,562 INFO L124 PetriNetUnfolderBase]: 1/51 cut-off events. [2024-06-28 01:06:51,562 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-28 01:06:51,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 1/51 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-06-28 01:06:51,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 54 transitions, 129 flow [2024-06-28 01:06:51,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 50 transitions, 118 flow [2024-06-28 01:06:51,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:06:51,587 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;@2d57ab3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:06:51,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 01:06:51,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:06:51,593 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-06-28 01:06:51,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:06:51,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:51,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-28 01:06:51,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:51,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash -682997573, now seen corresponding path program 1 times [2024-06-28 01:06:51,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:51,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836698629] [2024-06-28 01:06:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:51,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836698629] [2024-06-28 01:06:51,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836698629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:51,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:51,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:06:51,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389747833] [2024-06-28 01:06:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:51,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:06:51,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:06:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:06:51,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-06-28 01:06:51,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:51,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:51,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-06-28 01:06:51,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:52,307 INFO L124 PetriNetUnfolderBase]: 2010/3391 cut-off events. [2024-06-28 01:06:52,307 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-06-28 01:06:52,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 3391 events. 2010/3391 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20574 event pairs, 885 based on Foata normal form. 5/3322 useless extension candidates. Maximal degree in co-relation 6387. Up to 2984 conditions per place. [2024-06-28 01:06:52,335 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 44 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-06-28 01:06:52,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 244 flow [2024-06-28 01:06:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:06:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:06:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-28 01:06:52,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-28 01:06:52,347 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 118 flow. Second operand 3 states and 107 transitions. [2024-06-28 01:06:52,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 244 flow [2024-06-28 01:06:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 228 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:06:52,358 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 129 flow [2024-06-28 01:06:52,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-28 01:06:52,364 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2024-06-28 01:06:52,365 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 129 flow [2024-06-28 01:06:52,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:52,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:52,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:06:52,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:52,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 641761273, now seen corresponding path program 1 times [2024-06-28 01:06:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325438892] [2024-06-28 01:06:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:52,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325438892] [2024-06-28 01:06:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325438892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:52,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:52,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:06:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939983181] [2024-06-28 01:06:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:52,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:06:52,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:06:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:06:52,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-06-28 01:06:52,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:52,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:52,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-06-28 01:06:52,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:52,774 INFO L124 PetriNetUnfolderBase]: 1228/2256 cut-off events. [2024-06-28 01:06:52,775 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-28 01:06:52,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4282 conditions, 2256 events. 1228/2256 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14125 event pairs, 1220 based on Foata normal form. 0/2148 useless extension candidates. Maximal degree in co-relation 3907. Up to 1912 conditions per place. [2024-06-28 01:06:52,786 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 28 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-06-28 01:06:52,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 191 flow [2024-06-28 01:06:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:06:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:06:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-28 01:06:52,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-28 01:06:52,790 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 129 flow. Second operand 3 states and 103 transitions. [2024-06-28 01:06:52,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 191 flow [2024-06-28 01:06:52,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:52,793 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 138 flow [2024-06-28 01:06:52,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-28 01:06:52,795 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-06-28 01:06:52,795 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 138 flow [2024-06-28 01:06:52,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:52,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:52,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:52,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:06:52,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:52,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1224958484, now seen corresponding path program 1 times [2024-06-28 01:06:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:52,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32185780] [2024-06-28 01:06:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:52,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32185780] [2024-06-28 01:06:52,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32185780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:52,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:52,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257134855] [2024-06-28 01:06:52,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:52,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:06:52,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:52,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:06:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:06:52,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-28 01:06:52,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:52,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:52,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-28 01:06:52,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:53,465 INFO L124 PetriNetUnfolderBase]: 3390/5451 cut-off events. [2024-06-28 01:06:53,465 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2024-06-28 01:06:53,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11425 conditions, 5451 events. 3390/5451 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 32816 event pairs, 783 based on Foata normal form. 95/5541 useless extension candidates. Maximal degree in co-relation 11412. Up to 2814 conditions per place. [2024-06-28 01:06:53,488 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 88 selfloop transitions, 10 changer transitions 0/111 dead transitions. [2024-06-28 01:06:53,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 111 transitions, 475 flow [2024-06-28 01:06:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-06-28 01:06:53,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 01:06:53,490 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 138 flow. Second operand 5 states and 178 transitions. [2024-06-28 01:06:53,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 111 transitions, 475 flow [2024-06-28 01:06:53,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 111 transitions, 471 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:53,492 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 196 flow [2024-06-28 01:06:53,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-28 01:06:53,493 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2024-06-28 01:06:53,493 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 196 flow [2024-06-28 01:06:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:53,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:53,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:53,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:06:53,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:53,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash -366846924, now seen corresponding path program 1 times [2024-06-28 01:06:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388005320] [2024-06-28 01:06:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388005320] [2024-06-28 01:06:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388005320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:53,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:53,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166074631] [2024-06-28 01:06:53,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:53,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:06:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:06:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:06:53,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-28 01:06:53,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:53,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-28 01:06:53,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:54,102 INFO L124 PetriNetUnfolderBase]: 3883/6408 cut-off events. [2024-06-28 01:06:54,102 INFO L125 PetriNetUnfolderBase]: For 2666/2762 co-relation queries the response was YES. [2024-06-28 01:06:54,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14754 conditions, 6408 events. 3883/6408 cut-off events. For 2666/2762 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 40081 event pairs, 1303 based on Foata normal form. 120/6493 useless extension candidates. Maximal degree in co-relation 14733. Up to 3051 conditions per place. [2024-06-28 01:06:54,143 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 85 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-06-28 01:06:54,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 112 transitions, 545 flow [2024-06-28 01:06:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-06-28 01:06:54,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 01:06:54,145 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 196 flow. Second operand 5 states and 174 transitions. [2024-06-28 01:06:54,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 112 transitions, 545 flow [2024-06-28 01:06:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 112 transitions, 534 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:54,149 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 268 flow [2024-06-28 01:06:54,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-06-28 01:06:54,150 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-06-28 01:06:54,150 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 268 flow [2024-06-28 01:06:54,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:54,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:54,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:06:54,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:54,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1112918926, now seen corresponding path program 1 times [2024-06-28 01:06:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:54,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927955322] [2024-06-28 01:06:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:54,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:54,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927955322] [2024-06-28 01:06:54,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927955322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:54,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:54,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:06:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284194067] [2024-06-28 01:06:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:54,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:06:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:06:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:06:54,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:06:54,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:54,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:54,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:06:54,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:55,336 INFO L124 PetriNetUnfolderBase]: 7306/11784 cut-off events. [2024-06-28 01:06:55,337 INFO L125 PetriNetUnfolderBase]: For 10075/10075 co-relation queries the response was YES. [2024-06-28 01:06:55,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29035 conditions, 11784 events. 7306/11784 cut-off events. For 10075/10075 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 79618 event pairs, 1715 based on Foata normal form. 270/12037 useless extension candidates. Maximal degree in co-relation 29010. Up to 2485 conditions per place. [2024-06-28 01:06:55,392 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 153 selfloop transitions, 26 changer transitions 0/191 dead transitions. [2024-06-28 01:06:55,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 191 transitions, 1014 flow [2024-06-28 01:06:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:06:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:06:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 310 transitions. [2024-06-28 01:06:55,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378600823045267 [2024-06-28 01:06:55,398 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 268 flow. Second operand 9 states and 310 transitions. [2024-06-28 01:06:55,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 191 transitions, 1014 flow [2024-06-28 01:06:55,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 191 transitions, 990 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:55,408 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 447 flow [2024-06-28 01:06:55,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=447, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-06-28 01:06:55,410 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 23 predicate places. [2024-06-28 01:06:55,410 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 447 flow [2024-06-28 01:06:55,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:55,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:55,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:55,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:06:55,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:55,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash -131876424, now seen corresponding path program 2 times [2024-06-28 01:06:55,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:55,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325756050] [2024-06-28 01:06:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:55,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:55,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:55,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325756050] [2024-06-28 01:06:55,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325756050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:55,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:55,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:06:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600556289] [2024-06-28 01:06:55,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:55,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:06:55,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:06:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:06:55,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:06:55,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:55,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:55,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:06:55,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:57,037 INFO L124 PetriNetUnfolderBase]: 10567/16896 cut-off events. [2024-06-28 01:06:57,038 INFO L125 PetriNetUnfolderBase]: For 35329/35341 co-relation queries the response was YES. [2024-06-28 01:06:57,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46870 conditions, 16896 events. 10567/16896 cut-off events. For 35329/35341 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 120231 event pairs, 3343 based on Foata normal form. 200/17063 useless extension candidates. Maximal degree in co-relation 46839. Up to 10797 conditions per place. [2024-06-28 01:06:57,129 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 164 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-28 01:06:57,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 198 transitions, 1283 flow [2024-06-28 01:06:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:06:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:06:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 300 transitions. [2024-06-28 01:06:57,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-28 01:06:57,131 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 447 flow. Second operand 9 states and 300 transitions. [2024-06-28 01:06:57,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 198 transitions, 1283 flow [2024-06-28 01:06:57,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 198 transitions, 1260 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:57,281 INFO L231 Difference]: Finished difference. Result has 95 places, 92 transitions, 700 flow [2024-06-28 01:06:57,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=700, PETRI_PLACES=95, PETRI_TRANSITIONS=92} [2024-06-28 01:06:57,281 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 36 predicate places. [2024-06-28 01:06:57,281 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 92 transitions, 700 flow [2024-06-28 01:06:57,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:57,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:57,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:06:57,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:57,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1853416330, now seen corresponding path program 3 times [2024-06-28 01:06:57,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:57,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040399926] [2024-06-28 01:06:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:57,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:57,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:57,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040399926] [2024-06-28 01:06:57,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040399926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:57,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:57,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:06:57,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531387399] [2024-06-28 01:06:57,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:57,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:06:57,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:06:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:06:57,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:06:57,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 92 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:57,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:57,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:06:57,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:59,066 INFO L124 PetriNetUnfolderBase]: 11798/18985 cut-off events. [2024-06-28 01:06:59,066 INFO L125 PetriNetUnfolderBase]: For 71110/71110 co-relation queries the response was YES. [2024-06-28 01:06:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55342 conditions, 18985 events. 11798/18985 cut-off events. For 71110/71110 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 138936 event pairs, 3781 based on Foata normal form. 258/19226 useless extension candidates. Maximal degree in co-relation 55304. Up to 12837 conditions per place. [2024-06-28 01:06:59,164 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 189 selfloop transitions, 25 changer transitions 0/226 dead transitions. [2024-06-28 01:06:59,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 226 transitions, 1558 flow [2024-06-28 01:06:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:06:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:06:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 356 transitions. [2024-06-28 01:06:59,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993265993265994 [2024-06-28 01:06:59,166 INFO L175 Difference]: Start difference. First operand has 95 places, 92 transitions, 700 flow. Second operand 11 states and 356 transitions. [2024-06-28 01:06:59,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 226 transitions, 1558 flow [2024-06-28 01:06:59,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 226 transitions, 1535 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:59,367 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 869 flow [2024-06-28 01:06:59,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=869, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-06-28 01:06:59,368 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 50 predicate places. [2024-06-28 01:06:59,368 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 869 flow [2024-06-28 01:06:59,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:59,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:59,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:59,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:06:59,369 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:06:59,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 564837180, now seen corresponding path program 4 times [2024-06-28 01:06:59,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:59,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515833769] [2024-06-28 01:06:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:59,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:59,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:59,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515833769] [2024-06-28 01:06:59,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515833769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:59,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:59,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:06:59,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847943448] [2024-06-28 01:06:59,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:59,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:06:59,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:06:59,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:06:59,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:06:59,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:06:59,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:59,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:06:59,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:01,164 INFO L124 PetriNetUnfolderBase]: 11242/18053 cut-off events. [2024-06-28 01:07:01,164 INFO L125 PetriNetUnfolderBase]: For 101431/101431 co-relation queries the response was YES. [2024-06-28 01:07:01,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56110 conditions, 18053 events. 11242/18053 cut-off events. For 101431/101431 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 130378 event pairs, 3731 based on Foata normal form. 150/18186 useless extension candidates. Maximal degree in co-relation 56066. Up to 12837 conditions per place. [2024-06-28 01:07:01,265 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 167 selfloop transitions, 23 changer transitions 0/202 dead transitions. [2024-06-28 01:07:01,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 202 transitions, 1520 flow [2024-06-28 01:07:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:07:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:07:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 295 transitions. [2024-06-28 01:07:01,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6069958847736625 [2024-06-28 01:07:01,267 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 869 flow. Second operand 9 states and 295 transitions. [2024-06-28 01:07:01,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 202 transitions, 1520 flow [2024-06-28 01:07:01,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 202 transitions, 1458 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 01:07:01,519 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 860 flow [2024-06-28 01:07:01,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=860, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2024-06-28 01:07:01,519 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 57 predicate places. [2024-06-28 01:07:01,520 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 860 flow [2024-06-28 01:07:01,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:07:01,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:01,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:01,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:07:01,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:01,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1124346464, now seen corresponding path program 5 times [2024-06-28 01:07:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:01,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458025324] [2024-06-28 01:07:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:01,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:01,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458025324] [2024-06-28 01:07:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458025324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:07:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901514491] [2024-06-28 01:07:01,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:07:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:07:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:07:01,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:01,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 860 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:07:01,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:01,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:01,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:03,201 INFO L124 PetriNetUnfolderBase]: 10756/17387 cut-off events. [2024-06-28 01:07:03,201 INFO L125 PetriNetUnfolderBase]: For 96644/96674 co-relation queries the response was YES. [2024-06-28 01:07:03,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52617 conditions, 17387 events. 10756/17387 cut-off events. For 96644/96674 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 125985 event pairs, 3268 based on Foata normal form. 156/17510 useless extension candidates. Maximal degree in co-relation 52571. Up to 11918 conditions per place. [2024-06-28 01:07:03,306 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 187 selfloop transitions, 25 changer transitions 0/224 dead transitions. [2024-06-28 01:07:03,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 224 transitions, 1662 flow [2024-06-28 01:07:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:07:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:07:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 348 transitions. [2024-06-28 01:07:03,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-06-28 01:07:03,310 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 860 flow. Second operand 11 states and 348 transitions. [2024-06-28 01:07:03,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 224 transitions, 1662 flow [2024-06-28 01:07:03,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 224 transitions, 1612 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 01:07:03,725 INFO L231 Difference]: Finished difference. Result has 119 places, 100 transitions, 867 flow [2024-06-28 01:07:03,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=867, PETRI_PLACES=119, PETRI_TRANSITIONS=100} [2024-06-28 01:07:03,726 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 60 predicate places. [2024-06-28 01:07:03,726 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 100 transitions, 867 flow [2024-06-28 01:07:03,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:07:03,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:03,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:03,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:07:03,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:03,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash 503559282, now seen corresponding path program 6 times [2024-06-28 01:07:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:03,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985170912] [2024-06-28 01:07:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:03,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985170912] [2024-06-28 01:07:03,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985170912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:03,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:03,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:07:03,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207896436] [2024-06-28 01:07:03,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:03,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:07:03,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:07:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:07:03,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:03,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 100 transitions, 867 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:07:03,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:03,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:03,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:05,081 INFO L124 PetriNetUnfolderBase]: 10096/16566 cut-off events. [2024-06-28 01:07:05,081 INFO L125 PetriNetUnfolderBase]: For 91554/91584 co-relation queries the response was YES. [2024-06-28 01:07:05,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47299 conditions, 16566 events. 10096/16566 cut-off events. For 91554/91584 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 120376 event pairs, 1714 based on Foata normal form. 276/16835 useless extension candidates. Maximal degree in co-relation 47252. Up to 3940 conditions per place. [2024-06-28 01:07:05,303 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 147 selfloop transitions, 51 changer transitions 0/210 dead transitions. [2024-06-28 01:07:05,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 210 transitions, 1638 flow [2024-06-28 01:07:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:07:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:07:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 303 transitions. [2024-06-28 01:07:05,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-28 01:07:05,304 INFO L175 Difference]: Start difference. First operand has 119 places, 100 transitions, 867 flow. Second operand 9 states and 303 transitions. [2024-06-28 01:07:05,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 210 transitions, 1638 flow [2024-06-28 01:07:05,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 210 transitions, 1566 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 01:07:05,466 INFO L231 Difference]: Finished difference. Result has 120 places, 103 transitions, 964 flow [2024-06-28 01:07:05,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=964, PETRI_PLACES=120, PETRI_TRANSITIONS=103} [2024-06-28 01:07:05,466 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 61 predicate places. [2024-06-28 01:07:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 103 transitions, 964 flow [2024-06-28 01:07:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-28 01:07:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:05,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:07:05,467 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:05,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash -85935875, now seen corresponding path program 1 times [2024-06-28 01:07:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444094830] [2024-06-28 01:07:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:05,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444094830] [2024-06-28 01:07:05,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444094830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:05,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:05,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:07:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706381943] [2024-06-28 01:07:05,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:05,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:07:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:07:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:07:05,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-28 01:07:05,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 103 transitions, 964 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:05,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-28 01:07:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:06,711 INFO L124 PetriNetUnfolderBase]: 9631/15862 cut-off events. [2024-06-28 01:07:06,711 INFO L125 PetriNetUnfolderBase]: For 85869/86152 co-relation queries the response was YES. [2024-06-28 01:07:06,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45623 conditions, 15862 events. 9631/15862 cut-off events. For 85869/86152 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 116218 event pairs, 2483 based on Foata normal form. 146/15905 useless extension candidates. Maximal degree in co-relation 45574. Up to 9008 conditions per place. [2024-06-28 01:07:06,816 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 77 selfloop transitions, 38 changer transitions 0/135 dead transitions. [2024-06-28 01:07:06,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 135 transitions, 1333 flow [2024-06-28 01:07:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:07:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:07:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-06-28 01:07:06,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-28 01:07:06,818 INFO L175 Difference]: Start difference. First operand has 120 places, 103 transitions, 964 flow. Second operand 4 states and 143 transitions. [2024-06-28 01:07:06,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 135 transitions, 1333 flow [2024-06-28 01:07:07,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 135 transitions, 1221 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 01:07:07,129 INFO L231 Difference]: Finished difference. Result has 118 places, 102 transitions, 946 flow [2024-06-28 01:07:07,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=946, PETRI_PLACES=118, PETRI_TRANSITIONS=102} [2024-06-28 01:07:07,129 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2024-06-28 01:07:07,129 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 102 transitions, 946 flow [2024-06-28 01:07:07,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:07,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:07,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:07,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:07:07,130 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:07,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1176534127, now seen corresponding path program 1 times [2024-06-28 01:07:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:07,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981717145] [2024-06-28 01:07:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981717145] [2024-06-28 01:07:07,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981717145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:07,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:07,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:07:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856538097] [2024-06-28 01:07:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:07:07,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:07:07,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:07:07,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-28 01:07:07,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 102 transitions, 946 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:07,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:07,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-28 01:07:07,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:08,324 INFO L124 PetriNetUnfolderBase]: 9323/15349 cut-off events. [2024-06-28 01:07:08,324 INFO L125 PetriNetUnfolderBase]: For 68691/68883 co-relation queries the response was YES. [2024-06-28 01:07:08,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41770 conditions, 15349 events. 9323/15349 cut-off events. For 68691/68883 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 112741 event pairs, 2414 based on Foata normal form. 147/15427 useless extension candidates. Maximal degree in co-relation 41721. Up to 8693 conditions per place. [2024-06-28 01:07:08,409 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 79 selfloop transitions, 38 changer transitions 0/137 dead transitions. [2024-06-28 01:07:08,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 137 transitions, 1333 flow [2024-06-28 01:07:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:07:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:07:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-06-28 01:07:08,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 01:07:08,410 INFO L175 Difference]: Start difference. First operand has 118 places, 102 transitions, 946 flow. Second operand 4 states and 144 transitions. [2024-06-28 01:07:08,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 137 transitions, 1333 flow [2024-06-28 01:07:08,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 137 transitions, 1261 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 01:07:08,493 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 978 flow [2024-06-28 01:07:08,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=978, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2024-06-28 01:07:08,493 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 60 predicate places. [2024-06-28 01:07:08,493 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 978 flow [2024-06-28 01:07:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:08,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:08,494 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] [2024-06-28 01:07:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:07:08,494 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:08,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1022104479, now seen corresponding path program 1 times [2024-06-28 01:07:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163663422] [2024-06-28 01:07:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:08,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:08,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163663422] [2024-06-28 01:07:08,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163663422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:08,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:08,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:07:08,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39280787] [2024-06-28 01:07:08,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:08,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:08,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:07:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:08,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 978 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:08,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:08,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:09,921 INFO L124 PetriNetUnfolderBase]: 10023/16400 cut-off events. [2024-06-28 01:07:09,921 INFO L125 PetriNetUnfolderBase]: For 58475/58475 co-relation queries the response was YES. [2024-06-28 01:07:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44898 conditions, 16400 events. 10023/16400 cut-off events. For 58475/58475 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 118044 event pairs, 1621 based on Foata normal form. 60/16443 useless extension candidates. Maximal degree in co-relation 44848. Up to 3940 conditions per place. [2024-06-28 01:07:10,008 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 189 selfloop transitions, 52 changer transitions 0/253 dead transitions. [2024-06-28 01:07:10,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 253 transitions, 1871 flow [2024-06-28 01:07:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:07:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:07:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 389 transitions. [2024-06-28 01:07:10,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6003086419753086 [2024-06-28 01:07:10,010 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 978 flow. Second operand 12 states and 389 transitions. [2024-06-28 01:07:10,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 253 transitions, 1871 flow [2024-06-28 01:07:10,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 253 transitions, 1792 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 01:07:10,139 INFO L231 Difference]: Finished difference. Result has 128 places, 103 transitions, 1030 flow [2024-06-28 01:07:10,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1030, PETRI_PLACES=128, PETRI_TRANSITIONS=103} [2024-06-28 01:07:10,140 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 69 predicate places. [2024-06-28 01:07:10,140 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 1030 flow [2024-06-28 01:07:10,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:10,140 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] [2024-06-28 01:07:10,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:07:10,141 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:10,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -806850187, now seen corresponding path program 2 times [2024-06-28 01:07:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022604193] [2024-06-28 01:07:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:10,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:10,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022604193] [2024-06-28 01:07:10,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022604193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:10,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:07:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429738508] [2024-06-28 01:07:10,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:10,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:07:10,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:10,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:07:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:07:10,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-28 01:07:10,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 103 transitions, 1030 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:10,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:10,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-28 01:07:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:11,119 INFO L124 PetriNetUnfolderBase]: 6878/12274 cut-off events. [2024-06-28 01:07:11,119 INFO L125 PetriNetUnfolderBase]: For 18097/18275 co-relation queries the response was YES. [2024-06-28 01:07:11,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30389 conditions, 12274 events. 6878/12274 cut-off events. For 18097/18275 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 96409 event pairs, 6413 based on Foata normal form. 167/12166 useless extension candidates. Maximal degree in co-relation 30338. Up to 10020 conditions per place. [2024-06-28 01:07:11,208 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 43 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-06-28 01:07:11,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 112 transitions, 1076 flow [2024-06-28 01:07:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:07:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:07:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-06-28 01:07:11,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-28 01:07:11,210 INFO L175 Difference]: Start difference. First operand has 128 places, 103 transitions, 1030 flow. Second operand 3 states and 111 transitions. [2024-06-28 01:07:11,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 112 transitions, 1076 flow [2024-06-28 01:07:11,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 112 transitions, 970 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 01:07:11,292 INFO L231 Difference]: Finished difference. Result has 123 places, 99 transitions, 860 flow [2024-06-28 01:07:11,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=860, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2024-06-28 01:07:11,293 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 64 predicate places. [2024-06-28 01:07:11,293 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 860 flow [2024-06-28 01:07:11,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:11,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:11,293 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] [2024-06-28 01:07:11,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:07:11,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:11,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash 991452213, now seen corresponding path program 3 times [2024-06-28 01:07:11,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:11,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165681757] [2024-06-28 01:07:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:11,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165681757] [2024-06-28 01:07:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165681757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:11,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:07:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361020734] [2024-06-28 01:07:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:11,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:07:11,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:11,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:11,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:11,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:11,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:12,846 INFO L124 PetriNetUnfolderBase]: 9498/15532 cut-off events. [2024-06-28 01:07:12,846 INFO L125 PetriNetUnfolderBase]: For 33740/33740 co-relation queries the response was YES. [2024-06-28 01:07:12,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40842 conditions, 15532 events. 9498/15532 cut-off events. For 33740/33740 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 109784 event pairs, 1985 based on Foata normal form. 60/15562 useless extension candidates. Maximal degree in co-relation 40792. Up to 3836 conditions per place. [2024-06-28 01:07:12,958 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 187 selfloop transitions, 48 changer transitions 0/247 dead transitions. [2024-06-28 01:07:12,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 247 transitions, 1658 flow [2024-06-28 01:07:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:07:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:07:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 387 transitions. [2024-06-28 01:07:12,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-28 01:07:12,960 INFO L175 Difference]: Start difference. First operand has 123 places, 99 transitions, 860 flow. Second operand 12 states and 387 transitions. [2024-06-28 01:07:12,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 247 transitions, 1658 flow [2024-06-28 01:07:13,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 247 transitions, 1650 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 01:07:13,083 INFO L231 Difference]: Finished difference. Result has 133 places, 99 transitions, 954 flow [2024-06-28 01:07:13,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=954, PETRI_PLACES=133, PETRI_TRANSITIONS=99} [2024-06-28 01:07:13,084 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 74 predicate places. [2024-06-28 01:07:13,084 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 99 transitions, 954 flow [2024-06-28 01:07:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:13,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:13,085 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] [2024-06-28 01:07:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:07:13,085 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:13,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1324451161, now seen corresponding path program 1 times [2024-06-28 01:07:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492452749] [2024-06-28 01:07:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492452749] [2024-06-28 01:07:13,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492452749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:13,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:13,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:07:13,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285176707] [2024-06-28 01:07:13,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:13,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:13,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:07:13,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:13,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 99 transitions, 954 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:13,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:13,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:13,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:14,418 INFO L124 PetriNetUnfolderBase]: 9723/16030 cut-off events. [2024-06-28 01:07:14,418 INFO L125 PetriNetUnfolderBase]: For 41883/41913 co-relation queries the response was YES. [2024-06-28 01:07:14,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43277 conditions, 16030 events. 9723/16030 cut-off events. For 41883/41913 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 115316 event pairs, 2000 based on Foata normal form. 66/16076 useless extension candidates. Maximal degree in co-relation 43225. Up to 3836 conditions per place. [2024-06-28 01:07:14,545 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 183 selfloop transitions, 48 changer transitions 0/243 dead transitions. [2024-06-28 01:07:14,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 243 transitions, 1740 flow [2024-06-28 01:07:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:07:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:07:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 382 transitions. [2024-06-28 01:07:14,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5895061728395061 [2024-06-28 01:07:14,547 INFO L175 Difference]: Start difference. First operand has 133 places, 99 transitions, 954 flow. Second operand 12 states and 382 transitions. [2024-06-28 01:07:14,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 243 transitions, 1740 flow [2024-06-28 01:07:14,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 243 transitions, 1640 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 01:07:14,669 INFO L231 Difference]: Finished difference. Result has 134 places, 100 transitions, 965 flow [2024-06-28 01:07:14,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=965, PETRI_PLACES=134, PETRI_TRANSITIONS=100} [2024-06-28 01:07:14,670 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 75 predicate places. [2024-06-28 01:07:14,670 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 100 transitions, 965 flow [2024-06-28 01:07:14,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:14,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:14,671 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] [2024-06-28 01:07:14,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:07:14,671 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:14,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1851252727, now seen corresponding path program 2 times [2024-06-28 01:07:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504590064] [2024-06-28 01:07:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:14,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:14,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:14,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504590064] [2024-06-28 01:07:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504590064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:14,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:14,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:07:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124079790] [2024-06-28 01:07:14,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:14,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:07:14,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:14,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 100 transitions, 965 flow. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:14,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:14,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:16,245 INFO L124 PetriNetUnfolderBase]: 9577/15824 cut-off events. [2024-06-28 01:07:16,246 INFO L125 PetriNetUnfolderBase]: For 31737/31763 co-relation queries the response was YES. [2024-06-28 01:07:16,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41727 conditions, 15824 events. 9577/15824 cut-off events. For 31737/31763 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 114006 event pairs, 1836 based on Foata normal form. 66/15870 useless extension candidates. Maximal degree in co-relation 41674. Up to 3836 conditions per place. [2024-06-28 01:07:16,376 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 181 selfloop transitions, 48 changer transitions 0/241 dead transitions. [2024-06-28 01:07:16,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 241 transitions, 1662 flow [2024-06-28 01:07:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:07:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:07:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 380 transitions. [2024-06-28 01:07:16,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864197530864198 [2024-06-28 01:07:16,378 INFO L175 Difference]: Start difference. First operand has 134 places, 100 transitions, 965 flow. Second operand 12 states and 380 transitions. [2024-06-28 01:07:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 241 transitions, 1662 flow [2024-06-28 01:07:16,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 241 transitions, 1448 flow, removed 6 selfloop flow, removed 23 redundant places. [2024-06-28 01:07:16,465 INFO L231 Difference]: Finished difference. Result has 120 places, 98 transitions, 771 flow [2024-06-28 01:07:16,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=771, PETRI_PLACES=120, PETRI_TRANSITIONS=98} [2024-06-28 01:07:16,465 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 61 predicate places. [2024-06-28 01:07:16,466 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 98 transitions, 771 flow [2024-06-28 01:07:16,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 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) [2024-06-28 01:07:16,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:16,466 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, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:16,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:07:16,466 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:16,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash 857020786, now seen corresponding path program 1 times [2024-06-28 01:07:16,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:16,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447026005] [2024-06-28 01:07:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:16,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:16,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447026005] [2024-06-28 01:07:16,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447026005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:16,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:16,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:07:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242282584] [2024-06-28 01:07:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:07:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:07:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:07:16,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-28 01:07:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 98 transitions, 771 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-28 01:07:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:17,546 INFO L124 PetriNetUnfolderBase]: 8771/14456 cut-off events. [2024-06-28 01:07:17,546 INFO L125 PetriNetUnfolderBase]: For 13255/13255 co-relation queries the response was YES. [2024-06-28 01:07:17,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36820 conditions, 14456 events. 8771/14456 cut-off events. For 13255/13255 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 101807 event pairs, 2176 based on Foata normal form. 65/14491 useless extension candidates. Maximal degree in co-relation 36783. Up to 3836 conditions per place. [2024-06-28 01:07:17,638 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 139 selfloop transitions, 46 changer transitions 0/197 dead transitions. [2024-06-28 01:07:17,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 197 transitions, 1350 flow [2024-06-28 01:07:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:07:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:07:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 288 transitions. [2024-06-28 01:07:17,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-28 01:07:17,639 INFO L175 Difference]: Start difference. First operand has 120 places, 98 transitions, 771 flow. Second operand 9 states and 288 transitions. [2024-06-28 01:07:17,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 197 transitions, 1350 flow [2024-06-28 01:07:17,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 1256 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-28 01:07:17,673 INFO L231 Difference]: Finished difference. Result has 118 places, 96 transitions, 758 flow [2024-06-28 01:07:17,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=758, PETRI_PLACES=118, PETRI_TRANSITIONS=96} [2024-06-28 01:07:17,674 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 59 predicate places. [2024-06-28 01:07:17,674 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 96 transitions, 758 flow [2024-06-28 01:07:17,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:17,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:17,674 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, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:17,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:07:17,675 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:17,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash 786438646, now seen corresponding path program 2 times [2024-06-28 01:07:17,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369378134] [2024-06-28 01:07:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:18,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369378134] [2024-06-28 01:07:18,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369378134] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:18,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210280151] [2024-06-28 01:07:18,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:07:18,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:18,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:18,084 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) [2024-06-28 01:07:18,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 01:07:18,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-28 01:07:18,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:18,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-28 01:07:18,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:18,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:18,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-06-28 01:07:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:18,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 01:07:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210280151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:18,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 01:07:18,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-06-28 01:07:18,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601026587] [2024-06-28 01:07:18,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:18,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:18,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:18,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:18,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-06-28 01:07:18,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-28 01:07:18,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 96 transitions, 758 flow. Second operand has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:18,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:18,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-28 01:07:18,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:20,014 INFO L124 PetriNetUnfolderBase]: 10146/17037 cut-off events. [2024-06-28 01:07:20,014 INFO L125 PetriNetUnfolderBase]: For 7208/7338 co-relation queries the response was YES. [2024-06-28 01:07:20,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40830 conditions, 17037 events. 10146/17037 cut-off events. For 7208/7338 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 129556 event pairs, 1648 based on Foata normal form. 74/16843 useless extension candidates. Maximal degree in co-relation 40792. Up to 9005 conditions per place. [2024-06-28 01:07:20,155 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 84 selfloop transitions, 14 changer transitions 18/180 dead transitions. [2024-06-28 01:07:20,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 180 transitions, 1186 flow [2024-06-28 01:07:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:07:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:07:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 336 transitions. [2024-06-28 01:07:20,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 01:07:20,157 INFO L175 Difference]: Start difference. First operand has 118 places, 96 transitions, 758 flow. Second operand 10 states and 336 transitions. [2024-06-28 01:07:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 180 transitions, 1186 flow [2024-06-28 01:07:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 180 transitions, 1094 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:07:20,206 INFO L231 Difference]: Finished difference. Result has 124 places, 109 transitions, 749 flow [2024-06-28 01:07:20,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=749, PETRI_PLACES=124, PETRI_TRANSITIONS=109} [2024-06-28 01:07:20,206 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 65 predicate places. [2024-06-28 01:07:20,206 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 109 transitions, 749 flow [2024-06-28 01:07:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:20,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:20,207 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, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:20,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-28 01:07:20,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:20,414 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash -687953440, now seen corresponding path program 3 times [2024-06-28 01:07:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:20,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886043691] [2024-06-28 01:07:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:20,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:20,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886043691] [2024-06-28 01:07:20,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886043691] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844273475] [2024-06-28 01:07:20,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:20,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:20,758 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) [2024-06-28 01:07:20,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 01:07:20,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-28 01:07:20,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:20,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-28 01:07:20,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:20,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:20,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-06-28 01:07:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:21,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 01:07:21,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844273475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:21,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 01:07:21,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-06-28 01:07:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128504175] [2024-06-28 01:07:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:21,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2024-06-28 01:07:21,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-28 01:07:21,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 109 transitions, 749 flow. Second operand has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:21,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:21,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-28 01:07:21,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:23,167 INFO L124 PetriNetUnfolderBase]: 15432/25753 cut-off events. [2024-06-28 01:07:23,167 INFO L125 PetriNetUnfolderBase]: For 9966/10096 co-relation queries the response was YES. [2024-06-28 01:07:23,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65266 conditions, 25753 events. 15432/25753 cut-off events. For 9966/10096 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 209276 event pairs, 3449 based on Foata normal form. 74/25400 useless extension candidates. Maximal degree in co-relation 65223. Up to 11709 conditions per place. [2024-06-28 01:07:23,411 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 136 selfloop transitions, 19 changer transitions 7/226 dead transitions. [2024-06-28 01:07:23,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 226 transitions, 1411 flow [2024-06-28 01:07:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:07:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:07:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 389 transitions. [2024-06-28 01:07:23,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6548821548821548 [2024-06-28 01:07:23,412 INFO L175 Difference]: Start difference. First operand has 124 places, 109 transitions, 749 flow. Second operand 11 states and 389 transitions. [2024-06-28 01:07:23,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 226 transitions, 1411 flow [2024-06-28 01:07:23,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 226 transitions, 1405 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 01:07:23,491 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 909 flow [2024-06-28 01:07:23,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=909, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2024-06-28 01:07:23,491 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 80 predicate places. [2024-06-28 01:07:23,491 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 909 flow [2024-06-28 01:07:23,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:23,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:23,491 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, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:23,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:23,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-06-28 01:07:23,703 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:07:23,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash 570298410, now seen corresponding path program 4 times [2024-06-28 01:07:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:23,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443407261] [2024-06-28 01:07:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:24,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:24,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443407261] [2024-06-28 01:07:24,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443407261] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:24,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460154002] [2024-06-28 01:07:24,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:07:24,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:24,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:24,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 01:07:24,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:07:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:24,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-28 01:07:24,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:24,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:24,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-06-28 01:07:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:24,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 01:07:24,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460154002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:24,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 01:07:24,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-06-28 01:07:24,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058640104] [2024-06-28 01:07:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:24,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:07:24,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:07:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-06-28 01:07:24,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-28 01:07:24,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 909 flow. Second operand has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:24,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:24,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-28 01:07:24,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand