./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy6.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/test-easy6.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-easy6.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/test-easy6.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 01:10:44,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:10:44,871 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:10:44,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:10:44,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:10:44,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:10:44,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:10:44,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:10:44,903 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:10:44,906 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:10:44,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:10:44,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:10:44,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:10:44,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:10:44,909 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:10:44,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:10:44,910 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:10:44,910 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:10:44,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:10:44,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:10:44,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:10:44,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:10:44,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:10:44,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:10:44,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:10:44,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:10:44,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:10:44,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:10:44,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:10:44,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:10:44,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:10:44,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:10:44,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:10:44,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:10:44,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:10:44,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:10:44,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:10:44,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:10:44,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:10:44,915 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:10:44,916 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:10:44,916 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:10:44,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:10:44,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:10:45,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:10:45,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:10:45,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:10:45,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:10:45,169 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:10:45,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy6.wvr.c [2024-06-28 01:10:46,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:10:46,371 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:10:46,371 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy6.wvr.c [2024-06-28 01:10:46,378 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63b3bb2f7/ea17cf202ce643aabb48ae30c8cf1c85/FLAG074013b86 [2024-06-28 01:10:46,391 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63b3bb2f7/ea17cf202ce643aabb48ae30c8cf1c85 [2024-06-28 01:10:46,393 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:10:46,394 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:10:46,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/test-easy6.wvr.yml/witness.yml [2024-06-28 01:10:46,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:10:46,508 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:10:46,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:10:46,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:10:46,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:10:46,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:10:46" (1/2) ... [2024-06-28 01:10:46,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d12301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:10:46, skipping insertion in model container [2024-06-28 01:10:46,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:10:46" (1/2) ... [2024-06-28 01:10:46,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a60a7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:10:46, skipping insertion in model container [2024-06-28 01:10:46,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:10:46" (2/2) ... [2024-06-28 01:10:46,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d12301 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:10:46, skipping insertion in model container [2024-06-28 01:10:46,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:10:46" (2/2) ... [2024-06-28 01:10:46,517 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:10:46,538 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:10:46,542 INFO L97 edCorrectnessWitness]: Location invariant before [L112-L112] (((((((! multithreaded || 0 <= i2) && (! multithreaded || 0 <= n2)) && (! multithreaded || 0 <= tmp2)) && (! multithreaded || 0 <= i)) && (! multithreaded || 0 <= n1)) && (! multithreaded || 0 <= i1)) && (! multithreaded || ((((((0 <= n1 && 0 <= n2) && 0 <= tmp1) && 0 <= tmp2) && 0 <= i) && 0 <= i1) && 0 <= i2))) && (! multithreaded || 0 <= tmp1) [2024-06-28 01:10:46,542 INFO L97 edCorrectnessWitness]: Location invariant before [L111-L111] (((((((! multithreaded || 0 <= i2) && (! multithreaded || 0 <= n2)) && (! multithreaded || 0 <= tmp2)) && (! multithreaded || 0 <= i)) && (! multithreaded || 0 <= n1)) && (! multithreaded || 0 <= i1)) && (! multithreaded || ((((((0 <= n1 && 0 <= n2) && 0 <= tmp1) && 0 <= tmp2) && 0 <= i) && 0 <= i1) && 0 <= i2))) && (! multithreaded || 0 <= tmp1) [2024-06-28 01:10:46,542 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:10:46,543 INFO L106 edCorrectnessWitness]: ghost_update [L110-L110] multithreaded = 1; [2024-06-28 01:10:46,559 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:10:46,762 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy6.wvr.c[3072,3085] [2024-06-28 01:10:46,766 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:10:46,773 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:10:46,818 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy6.wvr.c[3072,3085] [2024-06-28 01:10:46,818 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:10:46,831 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:10:46,832 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:10:46 WrapperNode [2024-06-28 01:10:46,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:10:46,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:10:46,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:10:46,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:10:46,839 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,846 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,864 INFO L138 Inliner]: procedures = 20, calls = 49, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 117 [2024-06-28 01:10:46,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:10:46,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:10:46,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:10:46,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:10:46,873 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,873 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,875 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,892 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 01:10:46,893 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,893 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,896 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,898 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,899 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,899 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:10:46,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:10:46,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:10:46,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:10:46,902 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 01:10:46" (1/1) ... [2024-06-28 01:10:46,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:10:46,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:10:46,926 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 01:10:46,928 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 01:10:46,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:10:46,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 01:10:46,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 01:10:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 01:10:46,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 01:10:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:10:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:10:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:10:46,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:10:46,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:10:46,966 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 01:10:47,046 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:10:47,048 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:10:47,212 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:10:47,213 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:10:47,323 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:10:47,323 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:10:47,324 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:10:47 BoogieIcfgContainer [2024-06-28 01:10:47,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:10:47,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:10:47,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:10:47,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:10:47,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:10:46" (1/4) ... [2024-06-28 01:10:47,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a78714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:10:47, skipping insertion in model container [2024-06-28 01:10:47,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:10:46" (2/4) ... [2024-06-28 01:10:47,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a78714 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:10:47, skipping insertion in model container [2024-06-28 01:10:47,333 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 01:10:46" (3/4) ... [2024-06-28 01:10:47,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a78714 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:10:47, skipping insertion in model container [2024-06-28 01:10:47,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:10:47" (4/4) ... [2024-06-28 01:10:47,335 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy6.wvr.c [2024-06-28 01:10:47,352 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:10:47,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:10:47,353 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:10:47,387 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 01:10:47,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 39 transitions, 92 flow [2024-06-28 01:10:47,433 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 01:10:47,433 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 01:10:47,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 0/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-06-28 01:10:47,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 39 transitions, 92 flow [2024-06-28 01:10:47,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 36 transitions, 84 flow [2024-06-28 01:10:47,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:10:47,451 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;@61f5579, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:10:47,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:10:47,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:10:47,455 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 01:10:47,455 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:10:47,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:47,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:10:47,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:47,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 244599668, now seen corresponding path program 1 times [2024-06-28 01:10:47,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695111120] [2024-06-28 01:10:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:47,786 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 01:10:47,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:47,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695111120] [2024-06-28 01:10:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695111120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:47,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:47,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:10:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591591344] [2024-06-28 01:10:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:47,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:10:47,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:47,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:10:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:10:47,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-28 01:10:47,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:10:47,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:47,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-28 01:10:47,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:48,011 INFO L124 PetriNetUnfolderBase]: 161/384 cut-off events. [2024-06-28 01:10:48,012 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-28 01:10:48,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 384 events. 161/384 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1813 event pairs, 67 based on Foata normal form. 3/368 useless extension candidates. Maximal degree in co-relation 668. Up to 287 conditions per place. [2024-06-28 01:10:48,019 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 26 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2024-06-28 01:10:48,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 161 flow [2024-06-28 01:10:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:10:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:10:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-28 01:10:48,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-28 01:10:48,034 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 84 flow. Second operand 3 states and 82 transitions. [2024-06-28 01:10:48,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 161 flow [2024-06-28 01:10:48,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:10:48,042 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 97 flow [2024-06-28 01:10:48,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-06-28 01:10:48,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-06-28 01:10:48,048 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 97 flow [2024-06-28 01:10:48,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:10:48,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:48,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:48,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:10:48,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:48,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1675204725, now seen corresponding path program 1 times [2024-06-28 01:10:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:48,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779280080] [2024-06-28 01:10:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:48,240 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 01:10:48,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779280080] [2024-06-28 01:10:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779280080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:48,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:48,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:10:48,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129750671] [2024-06-28 01:10:48,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:48,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:10:48,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:10:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:10:48,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-28 01:10:48,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:10:48,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:48,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-28 01:10:48,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:48,421 INFO L124 PetriNetUnfolderBase]: 154/372 cut-off events. [2024-06-28 01:10:48,422 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-06-28 01:10:48,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 372 events. 154/372 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1740 event pairs, 66 based on Foata normal form. 4/358 useless extension candidates. Maximal degree in co-relation 629. Up to 257 conditions per place. [2024-06-28 01:10:48,428 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 01:10:48,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 178 flow [2024-06-28 01:10:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:10:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:10:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-28 01:10:48,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7094017094017094 [2024-06-28 01:10:48,432 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 97 flow. Second operand 3 states and 83 transitions. [2024-06-28 01:10:48,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 178 flow [2024-06-28 01:10:48,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:48,436 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 120 flow [2024-06-28 01:10:48,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-06-28 01:10:48,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-06-28 01:10:48,438 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 120 flow [2024-06-28 01:10:48,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:10:48,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:48,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:48,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:10:48,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:48,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash -391219088, now seen corresponding path program 1 times [2024-06-28 01:10:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:48,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053444783] [2024-06-28 01:10:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:48,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:48,610 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 01:10:48,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053444783] [2024-06-28 01:10:48,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053444783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:48,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:48,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:10:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287062044] [2024-06-28 01:10:48,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:10:48,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:10:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:10:48,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-28 01:10:48,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 01:10:48,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:48,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-28 01:10:48,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:48,735 INFO L124 PetriNetUnfolderBase]: 232/503 cut-off events. [2024-06-28 01:10:48,735 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-06-28 01:10:48,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 503 events. 232/503 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2365 event pairs, 91 based on Foata normal form. 15/506 useless extension candidates. Maximal degree in co-relation 470. Up to 339 conditions per place. [2024-06-28 01:10:48,740 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-28 01:10:48,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 257 flow [2024-06-28 01:10:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:10:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:10:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-28 01:10:48,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-28 01:10:48,746 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 120 flow. Second operand 4 states and 103 transitions. [2024-06-28 01:10:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 257 flow [2024-06-28 01:10:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:48,750 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 158 flow [2024-06-28 01:10:48,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-06-28 01:10:48,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-28 01:10:48,751 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 158 flow [2024-06-28 01:10:48,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 01:10:48,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:48,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:48,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:10:48,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:48,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2070924242, now seen corresponding path program 1 times [2024-06-28 01:10:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:48,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303233702] [2024-06-28 01:10:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:48,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:49,001 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 01:10:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:49,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303233702] [2024-06-28 01:10:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303233702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:49,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:49,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:10:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170995370] [2024-06-28 01:10:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:10:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:10:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:10:49,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-28 01:10:49,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:10:49,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:49,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-28 01:10:49,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:49,152 INFO L124 PetriNetUnfolderBase]: 299/624 cut-off events. [2024-06-28 01:10:49,152 INFO L125 PetriNetUnfolderBase]: For 503/506 co-relation queries the response was YES. [2024-06-28 01:10:49,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 624 events. 299/624 cut-off events. For 503/506 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3030 event pairs, 90 based on Foata normal form. 12/619 useless extension candidates. Maximal degree in co-relation 676. Up to 340 conditions per place. [2024-06-28 01:10:49,156 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 50 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-28 01:10:49,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 357 flow [2024-06-28 01:10:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:10:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:10:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-28 01:10:49,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-28 01:10:49,158 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 158 flow. Second operand 5 states and 126 transitions. [2024-06-28 01:10:49,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 357 flow [2024-06-28 01:10:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 349 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:49,163 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 209 flow [2024-06-28 01:10:49,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-28 01:10:49,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-28 01:10:49,165 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 209 flow [2024-06-28 01:10:49,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:10:49,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:49,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:49,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:10:49,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:49,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:49,166 INFO L85 PathProgramCache]: Analyzing trace with hash -761277154, now seen corresponding path program 1 times [2024-06-28 01:10:49,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:49,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434190888] [2024-06-28 01:10:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:49,388 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 01:10:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:49,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434190888] [2024-06-28 01:10:49,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434190888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:49,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:49,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:10:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669772904] [2024-06-28 01:10:49,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:49,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:49,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:49,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:49,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:49,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:49,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 01:10:49,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:49,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:49,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:49,603 INFO L124 PetriNetUnfolderBase]: 433/878 cut-off events. [2024-06-28 01:10:49,603 INFO L125 PetriNetUnfolderBase]: For 1015/1021 co-relation queries the response was YES. [2024-06-28 01:10:49,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 878 events. 433/878 cut-off events. For 1015/1021 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4560 event pairs, 114 based on Foata normal form. 16/884 useless extension candidates. Maximal degree in co-relation 1333. Up to 562 conditions per place. [2024-06-28 01:10:49,608 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 50 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-06-28 01:10:49,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 394 flow [2024-06-28 01:10:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:10:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:10:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-28 01:10:49,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2024-06-28 01:10:49,609 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 209 flow. Second operand 5 states and 112 transitions. [2024-06-28 01:10:49,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 394 flow [2024-06-28 01:10:49,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 384 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:49,615 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 262 flow [2024-06-28 01:10:49,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-28 01:10:49,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 01:10:49,619 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 262 flow [2024-06-28 01:10:49,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 01:10:49,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:49,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:10:49,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:49,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:49,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1588304883, now seen corresponding path program 1 times [2024-06-28 01:10:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:49,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290997814] [2024-06-28 01:10:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:49,791 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 01:10:49,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:49,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290997814] [2024-06-28 01:10:49,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290997814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:49,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:49,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:10:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134669481] [2024-06-28 01:10:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:49,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:49,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:49,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-28 01:10:49,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:49,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:49,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-28 01:10:49,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:49,967 INFO L124 PetriNetUnfolderBase]: 335/679 cut-off events. [2024-06-28 01:10:49,968 INFO L125 PetriNetUnfolderBase]: For 1369/1378 co-relation queries the response was YES. [2024-06-28 01:10:49,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 679 events. 335/679 cut-off events. For 1369/1378 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3276 event pairs, 125 based on Foata normal form. 12/675 useless extension candidates. Maximal degree in co-relation 1040. Up to 495 conditions per place. [2024-06-28 01:10:49,972 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 52 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-28 01:10:49,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 437 flow [2024-06-28 01:10:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:10:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:10:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-28 01:10:49,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-28 01:10:49,974 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 262 flow. Second operand 5 states and 114 transitions. [2024-06-28 01:10:49,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 437 flow [2024-06-28 01:10:49,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 415 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 01:10:49,978 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 292 flow [2024-06-28 01:10:49,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-28 01:10:49,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-28 01:10:49,981 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 292 flow [2024-06-28 01:10:49,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:49,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:49,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:10:49,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:49,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1623892206, now seen corresponding path program 1 times [2024-06-28 01:10:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:49,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997931107] [2024-06-28 01:10:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:49,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:50,121 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 01:10:50,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:50,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997931107] [2024-06-28 01:10:50,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997931107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:50,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:50,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:10:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402999057] [2024-06-28 01:10:50,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:50,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:10:50,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:10:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:10:50,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-28 01:10:50,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 01:10:50,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:50,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-28 01:10:50,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:50,244 INFO L124 PetriNetUnfolderBase]: 348/704 cut-off events. [2024-06-28 01:10:50,245 INFO L125 PetriNetUnfolderBase]: For 1564/1564 co-relation queries the response was YES. [2024-06-28 01:10:50,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134 conditions, 704 events. 348/704 cut-off events. For 1564/1564 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3406 event pairs, 170 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 1527. Up to 589 conditions per place. [2024-06-28 01:10:50,249 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 49 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-28 01:10:50,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 463 flow [2024-06-28 01:10:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:10:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:10:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-28 01:10:50,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487179487179488 [2024-06-28 01:10:50,250 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 292 flow. Second operand 5 states and 107 transitions. [2024-06-28 01:10:50,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 463 flow [2024-06-28 01:10:50,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 442 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:50,253 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 314 flow [2024-06-28 01:10:50,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-28 01:10:50,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-28 01:10:50,254 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 314 flow [2024-06-28 01:10:50,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 01:10:50,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:50,254 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 01:10:50,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:10:50,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:50,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1500456861, now seen corresponding path program 1 times [2024-06-28 01:10:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404657239] [2024-06-28 01:10:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:50,381 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 01:10:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404657239] [2024-06-28 01:10:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404657239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:50,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:50,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:10:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78486605] [2024-06-28 01:10:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:50,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:50,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:50,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:50,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:50,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:50,524 INFO L124 PetriNetUnfolderBase]: 398/774 cut-off events. [2024-06-28 01:10:50,525 INFO L125 PetriNetUnfolderBase]: For 2122/2122 co-relation queries the response was YES. [2024-06-28 01:10:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 774 events. 398/774 cut-off events. For 2122/2122 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3618 event pairs, 204 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 1864. Up to 673 conditions per place. [2024-06-28 01:10:50,529 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 52 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-28 01:10:50,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 475 flow [2024-06-28 01:10:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:10:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:10:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-28 01:10:50,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2024-06-28 01:10:50,530 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 314 flow. Second operand 5 states and 103 transitions. [2024-06-28 01:10:50,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 475 flow [2024-06-28 01:10:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 465 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:50,535 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 346 flow [2024-06-28 01:10:50,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-06-28 01:10:50,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 01:10:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 346 flow [2024-06-28 01:10:50,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:50,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:50,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:50,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:10:50,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:50,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 220223724, now seen corresponding path program 1 times [2024-06-28 01:10:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25184833] [2024-06-28 01:10:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:50,572 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 01:10:50,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:50,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25184833] [2024-06-28 01:10:50,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25184833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:50,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:50,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:10:50,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115229003] [2024-06-28 01:10:50,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:50,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:10:50,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:10:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:10:50,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2024-06-28 01:10:50,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 01:10:50,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:50,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2024-06-28 01:10:50,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:50,626 INFO L124 PetriNetUnfolderBase]: 165/444 cut-off events. [2024-06-28 01:10:50,626 INFO L125 PetriNetUnfolderBase]: For 775/798 co-relation queries the response was YES. [2024-06-28 01:10:50,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 444 events. 165/444 cut-off events. For 775/798 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2402 event pairs, 111 based on Foata normal form. 11/440 useless extension candidates. Maximal degree in co-relation 1110. Up to 223 conditions per place. [2024-06-28 01:10:50,629 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 19 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-06-28 01:10:50,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 397 flow [2024-06-28 01:10:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:10:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:10:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-28 01:10:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7264957264957265 [2024-06-28 01:10:50,630 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 346 flow. Second operand 3 states and 85 transitions. [2024-06-28 01:10:50,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 397 flow [2024-06-28 01:10:50,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 389 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:50,635 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 346 flow [2024-06-28 01:10:50,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-28 01:10:50,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-28 01:10:50,636 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 346 flow [2024-06-28 01:10:50,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 01:10:50,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:50,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:50,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:10:50,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:50,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1520051111, now seen corresponding path program 1 times [2024-06-28 01:10:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:50,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89736903] [2024-06-28 01:10:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:50,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:50,676 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 01:10:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:50,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89736903] [2024-06-28 01:10:50,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89736903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:50,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:50,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:10:50,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588201009] [2024-06-28 01:10:50,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:50,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:10:50,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:10:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:10:50,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2024-06-28 01:10:50,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 01:10:50,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:50,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2024-06-28 01:10:50,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:50,745 INFO L124 PetriNetUnfolderBase]: 167/470 cut-off events. [2024-06-28 01:10:50,746 INFO L125 PetriNetUnfolderBase]: For 897/914 co-relation queries the response was YES. [2024-06-28 01:10:50,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 470 events. 167/470 cut-off events. For 897/914 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2526 event pairs, 107 based on Foata normal form. 6/457 useless extension candidates. Maximal degree in co-relation 1035. Up to 216 conditions per place. [2024-06-28 01:10:50,749 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 21 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-06-28 01:10:50,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 405 flow [2024-06-28 01:10:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:10:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:10:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-28 01:10:50,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2024-06-28 01:10:50,750 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 346 flow. Second operand 3 states and 87 transitions. [2024-06-28 01:10:50,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 405 flow [2024-06-28 01:10:50,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:10:50,754 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 350 flow [2024-06-28 01:10:50,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2024-06-28 01:10:50,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-28 01:10:50,756 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 350 flow [2024-06-28 01:10:50,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 01:10:50,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:50,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:50,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:10:50,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:50,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:50,757 INFO L85 PathProgramCache]: Analyzing trace with hash 212631081, now seen corresponding path program 2 times [2024-06-28 01:10:50,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:50,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401019402] [2024-06-28 01:10:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:50,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:50,919 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 01:10:50,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401019402] [2024-06-28 01:10:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401019402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:50,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:10:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634041317] [2024-06-28 01:10:50,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:50,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-28 01:10:50,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:50,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:50,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-28 01:10:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:51,075 INFO L124 PetriNetUnfolderBase]: 365/754 cut-off events. [2024-06-28 01:10:51,075 INFO L125 PetriNetUnfolderBase]: For 2527/2536 co-relation queries the response was YES. [2024-06-28 01:10:51,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 754 events. 365/754 cut-off events. For 2527/2536 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3580 event pairs, 154 based on Foata normal form. 8/751 useless extension candidates. Maximal degree in co-relation 1841. Up to 602 conditions per place. [2024-06-28 01:10:51,080 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 54 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-28 01:10:51,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 601 flow [2024-06-28 01:10:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:10:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:10:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-28 01:10:51,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 01:10:51,082 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 350 flow. Second operand 6 states and 130 transitions. [2024-06-28 01:10:51,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 601 flow [2024-06-28 01:10:51,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 597 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:10:51,087 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 450 flow [2024-06-28 01:10:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-06-28 01:10:51,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-28 01:10:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 450 flow [2024-06-28 01:10:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:51,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:10:51,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -731060929, now seen corresponding path program 3 times [2024-06-28 01:10:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384216658] [2024-06-28 01:10:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:51,237 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 01:10:51,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384216658] [2024-06-28 01:10:51,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384216658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:51,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:51,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:10:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336999381] [2024-06-28 01:10:51,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:51,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:51,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:51,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-28 01:10:51,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 450 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:51,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:51,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-28 01:10:51,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:51,383 INFO L124 PetriNetUnfolderBase]: 359/746 cut-off events. [2024-06-28 01:10:51,383 INFO L125 PetriNetUnfolderBase]: For 3098/3107 co-relation queries the response was YES. [2024-06-28 01:10:51,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2764 conditions, 746 events. 359/746 cut-off events. For 3098/3107 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3559 event pairs, 161 based on Foata normal form. 8/743 useless extension candidates. Maximal degree in co-relation 1961. Up to 566 conditions per place. [2024-06-28 01:10:51,388 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 50 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-28 01:10:51,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 653 flow [2024-06-28 01:10:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:10:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:10:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 01:10:51,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-28 01:10:51,390 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 450 flow. Second operand 6 states and 126 transitions. [2024-06-28 01:10:51,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 653 flow [2024-06-28 01:10:51,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 637 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 01:10:51,394 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 497 flow [2024-06-28 01:10:51,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2024-06-28 01:10:51,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 01:10:51,396 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 497 flow [2024-06-28 01:10:51,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:51,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:51,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:51,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:10:51,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:51,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash 419884800, now seen corresponding path program 1 times [2024-06-28 01:10:51,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:51,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298605260] [2024-06-28 01:10:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:51,561 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 01:10:51,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:51,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298605260] [2024-06-28 01:10:51,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298605260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:51,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:51,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216023541] [2024-06-28 01:10:51,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:10:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:51,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:10:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:10:51,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:51,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:51,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:51,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:51,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:51,784 INFO L124 PetriNetUnfolderBase]: 484/937 cut-off events. [2024-06-28 01:10:51,784 INFO L125 PetriNetUnfolderBase]: For 4565/4574 co-relation queries the response was YES. [2024-06-28 01:10:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 937 events. 484/937 cut-off events. For 4565/4574 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4547 event pairs, 140 based on Foata normal form. 12/939 useless extension candidates. Maximal degree in co-relation 2658. Up to 612 conditions per place. [2024-06-28 01:10:51,790 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 79 selfloop transitions, 27 changer transitions 0/117 dead transitions. [2024-06-28 01:10:51,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 117 transitions, 932 flow [2024-06-28 01:10:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:10:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:10:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-28 01:10:51,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-28 01:10:51,792 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 497 flow. Second operand 9 states and 189 transitions. [2024-06-28 01:10:51,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 117 transitions, 932 flow [2024-06-28 01:10:51,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 902 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 01:10:51,798 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 644 flow [2024-06-28 01:10:51,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2024-06-28 01:10:51,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-28 01:10:51,799 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 644 flow [2024-06-28 01:10:51,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:51,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:51,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:51,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:10:51,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:51,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1702407394, now seen corresponding path program 2 times [2024-06-28 01:10:51,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:51,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007165925] [2024-06-28 01:10:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:51,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:51,936 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 01:10:51,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007165925] [2024-06-28 01:10:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007165925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:51,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466859478] [2024-06-28 01:10:51,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:51,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:10:51,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:10:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:10:51,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:51,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:51,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:51,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:51,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:52,199 INFO L124 PetriNetUnfolderBase]: 523/1010 cut-off events. [2024-06-28 01:10:52,200 INFO L125 PetriNetUnfolderBase]: For 6314/6323 co-relation queries the response was YES. [2024-06-28 01:10:52,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4175 conditions, 1010 events. 523/1010 cut-off events. For 6314/6323 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5006 event pairs, 153 based on Foata normal form. 12/1012 useless extension candidates. Maximal degree in co-relation 3242. Up to 602 conditions per place. [2024-06-28 01:10:52,207 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 83 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-28 01:10:52,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 128 transitions, 1104 flow [2024-06-28 01:10:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:10:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:10:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-28 01:10:52,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2024-06-28 01:10:52,209 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 644 flow. Second operand 11 states and 225 transitions. [2024-06-28 01:10:52,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 128 transitions, 1104 flow [2024-06-28 01:10:52,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1055 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 01:10:52,218 INFO L231 Difference]: Finished difference. Result has 105 places, 90 transitions, 726 flow [2024-06-28 01:10:52,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=726, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2024-06-28 01:10:52,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 01:10:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 726 flow [2024-06-28 01:10:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:52,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:52,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:52,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:10:52,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:52,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash 433765980, now seen corresponding path program 3 times [2024-06-28 01:10:52,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:52,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701872455] [2024-06-28 01:10:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:52,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:52,360 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 01:10:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701872455] [2024-06-28 01:10:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701872455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:52,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:52,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:52,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908061077] [2024-06-28 01:10:52,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:52,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:10:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:10:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:10:52,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:52,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:52,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:52,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:52,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:52,596 INFO L124 PetriNetUnfolderBase]: 558/1077 cut-off events. [2024-06-28 01:10:52,597 INFO L125 PetriNetUnfolderBase]: For 7961/7970 co-relation queries the response was YES. [2024-06-28 01:10:52,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4586 conditions, 1077 events. 558/1077 cut-off events. For 7961/7970 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5453 event pairs, 148 based on Foata normal form. 12/1079 useless extension candidates. Maximal degree in co-relation 3911. Up to 539 conditions per place. [2024-06-28 01:10:52,604 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 73 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-28 01:10:52,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 126 transitions, 1158 flow [2024-06-28 01:10:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:10:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:10:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-28 01:10:52,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-28 01:10:52,606 INFO L175 Difference]: Start difference. First operand has 105 places, 90 transitions, 726 flow. Second operand 10 states and 200 transitions. [2024-06-28 01:10:52,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 126 transitions, 1158 flow [2024-06-28 01:10:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 126 transitions, 1105 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 01:10:52,615 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 822 flow [2024-06-28 01:10:52,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=822, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2024-06-28 01:10:52,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 01:10:52,616 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 822 flow [2024-06-28 01:10:52,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:52,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:52,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:52,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:10:52,617 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:52,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1425684885, now seen corresponding path program 1 times [2024-06-28 01:10:52,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:52,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458658309] [2024-06-28 01:10:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:52,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:52,778 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 01:10:52,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:52,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458658309] [2024-06-28 01:10:52,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458658309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:52,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:52,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792969919] [2024-06-28 01:10:52,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:52,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:52,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:52,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 822 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:52,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:52,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:52,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:53,058 INFO L124 PetriNetUnfolderBase]: 584/1146 cut-off events. [2024-06-28 01:10:53,058 INFO L125 PetriNetUnfolderBase]: For 10128/10155 co-relation queries the response was YES. [2024-06-28 01:10:53,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5045 conditions, 1146 events. 584/1146 cut-off events. For 10128/10155 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6132 event pairs, 179 based on Foata normal form. 14/1152 useless extension candidates. Maximal degree in co-relation 4364. Up to 848 conditions per place. [2024-06-28 01:10:53,067 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 95 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2024-06-28 01:10:53,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 132 transitions, 1225 flow [2024-06-28 01:10:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:10:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:10:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 01:10:53,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-28 01:10:53,068 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 822 flow. Second operand 8 states and 164 transitions. [2024-06-28 01:10:53,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 132 transitions, 1225 flow [2024-06-28 01:10:53,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 132 transitions, 1171 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 01:10:53,079 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 924 flow [2024-06-28 01:10:53,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=924, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2024-06-28 01:10:53,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-28 01:10:53,080 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 924 flow [2024-06-28 01:10:53,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:53,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:53,081 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 01:10:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:10:53,081 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:53,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1552975603, now seen corresponding path program 2 times [2024-06-28 01:10:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637929728] [2024-06-28 01:10:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:53,232 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 01:10:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637929728] [2024-06-28 01:10:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637929728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:53,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:53,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759527625] [2024-06-28 01:10:53,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:53,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:53,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:53,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:53,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:53,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:53,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:53,577 INFO L124 PetriNetUnfolderBase]: 618/1204 cut-off events. [2024-06-28 01:10:53,578 INFO L125 PetriNetUnfolderBase]: For 11391/11400 co-relation queries the response was YES. [2024-06-28 01:10:53,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1204 events. 618/1204 cut-off events. For 11391/11400 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6491 event pairs, 197 based on Foata normal form. 14/1210 useless extension candidates. Maximal degree in co-relation 4848. Up to 839 conditions per place. [2024-06-28 01:10:53,586 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 103 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-28 01:10:53,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 146 transitions, 1376 flow [2024-06-28 01:10:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:10:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:10:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 01:10:53,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-28 01:10:53,587 INFO L175 Difference]: Start difference. First operand has 116 places, 106 transitions, 924 flow. Second operand 9 states and 184 transitions. [2024-06-28 01:10:53,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 146 transitions, 1376 flow [2024-06-28 01:10:53,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 146 transitions, 1320 flow, removed 28 selfloop flow, removed 0 redundant places. [2024-06-28 01:10:53,601 INFO L231 Difference]: Finished difference. Result has 129 places, 116 transitions, 1060 flow [2024-06-28 01:10:53,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1060, PETRI_PLACES=129, PETRI_TRANSITIONS=116} [2024-06-28 01:10:53,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-28 01:10:53,601 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 116 transitions, 1060 flow [2024-06-28 01:10:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:53,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:53,602 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 01:10:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:10:53,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:53,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1234768981, now seen corresponding path program 3 times [2024-06-28 01:10:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:53,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684624313] [2024-06-28 01:10:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:53,754 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 01:10:53,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684624313] [2024-06-28 01:10:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684624313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925257577] [2024-06-28 01:10:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:53,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 116 transitions, 1060 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:53,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:53,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:54,035 INFO L124 PetriNetUnfolderBase]: 606/1184 cut-off events. [2024-06-28 01:10:54,035 INFO L125 PetriNetUnfolderBase]: For 11989/11995 co-relation queries the response was YES. [2024-06-28 01:10:54,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1184 events. 606/1184 cut-off events. For 11989/11995 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6341 event pairs, 198 based on Foata normal form. 12/1188 useless extension candidates. Maximal degree in co-relation 4986. Up to 871 conditions per place. [2024-06-28 01:10:54,043 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-06-28 01:10:54,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 145 transitions, 1411 flow [2024-06-28 01:10:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:10:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:10:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 01:10:54,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-28 01:10:54,045 INFO L175 Difference]: Start difference. First operand has 129 places, 116 transitions, 1060 flow. Second operand 8 states and 168 transitions. [2024-06-28 01:10:54,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 145 transitions, 1411 flow [2024-06-28 01:10:54,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 145 transitions, 1362 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 01:10:54,061 INFO L231 Difference]: Finished difference. Result has 135 places, 118 transitions, 1084 flow [2024-06-28 01:10:54,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=135, PETRI_TRANSITIONS=118} [2024-06-28 01:10:54,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-28 01:10:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 118 transitions, 1084 flow [2024-06-28 01:10:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:54,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:54,062 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 01:10:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:10:54,063 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:54,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash -822029264, now seen corresponding path program 1 times [2024-06-28 01:10:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626583987] [2024-06-28 01:10:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:54,110 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 01:10:54,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626583987] [2024-06-28 01:10:54,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626583987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:54,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:54,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:54,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070166438] [2024-06-28 01:10:54,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:54,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:54,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:54,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:54,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-28 01:10:54,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 118 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 01:10:54,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:54,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-28 01:10:54,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:54,319 INFO L124 PetriNetUnfolderBase]: 483/1129 cut-off events. [2024-06-28 01:10:54,319 INFO L125 PetriNetUnfolderBase]: For 8587/8647 co-relation queries the response was YES. [2024-06-28 01:10:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 1129 events. 483/1129 cut-off events. For 8587/8647 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7162 event pairs, 111 based on Foata normal form. 16/1116 useless extension candidates. Maximal degree in co-relation 4270. Up to 251 conditions per place. [2024-06-28 01:10:54,328 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 67 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2024-06-28 01:10:54,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 156 transitions, 1407 flow [2024-06-28 01:10:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:10:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:10:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-28 01:10:54,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-06-28 01:10:54,329 INFO L175 Difference]: Start difference. First operand has 135 places, 118 transitions, 1084 flow. Second operand 9 states and 228 transitions. [2024-06-28 01:10:54,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 156 transitions, 1407 flow [2024-06-28 01:10:54,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 156 transitions, 1340 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 01:10:54,346 INFO L231 Difference]: Finished difference. Result has 141 places, 117 transitions, 1148 flow [2024-06-28 01:10:54,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1148, PETRI_PLACES=141, PETRI_TRANSITIONS=117} [2024-06-28 01:10:54,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-28 01:10:54,347 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 117 transitions, 1148 flow [2024-06-28 01:10:54,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 01:10:54,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:54,348 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 01:10:54,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:10:54,348 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:54,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:54,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1390836685, now seen corresponding path program 1 times [2024-06-28 01:10:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:54,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215695426] [2024-06-28 01:10:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:54,507 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 01:10:54,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:54,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215695426] [2024-06-28 01:10:54,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215695426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:54,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:54,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389394162] [2024-06-28 01:10:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:54,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:54,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-28 01:10:54,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 117 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:10:54,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:54,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-28 01:10:54,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:54,907 INFO L124 PetriNetUnfolderBase]: 1245/2347 cut-off events. [2024-06-28 01:10:54,907 INFO L125 PetriNetUnfolderBase]: For 21023/21063 co-relation queries the response was YES. [2024-06-28 01:10:54,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10441 conditions, 2347 events. 1245/2347 cut-off events. For 21023/21063 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14158 event pairs, 384 based on Foata normal form. 6/2339 useless extension candidates. Maximal degree in co-relation 8516. Up to 1842 conditions per place. [2024-06-28 01:10:54,923 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 136 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-06-28 01:10:54,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 180 transitions, 1970 flow [2024-06-28 01:10:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:10:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:10:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 01:10:54,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-28 01:10:54,925 INFO L175 Difference]: Start difference. First operand has 141 places, 117 transitions, 1148 flow. Second operand 9 states and 182 transitions. [2024-06-28 01:10:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 180 transitions, 1970 flow [2024-06-28 01:10:54,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 1957 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:54,964 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 1491 flow [2024-06-28 01:10:54,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2024-06-28 01:10:54,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-28 01:10:54,965 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 1491 flow [2024-06-28 01:10:54,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 01:10:54,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:54,965 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 01:10:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:10:54,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:54,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash 47085603, now seen corresponding path program 2 times [2024-06-28 01:10:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225496445] [2024-06-28 01:10:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:54,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:10:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:55,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225496445] [2024-06-28 01:10:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225496445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769204424] [2024-06-28 01:10:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:10:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:10:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:10:55,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:55,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 1491 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:55,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:55,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:55,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:55,391 INFO L124 PetriNetUnfolderBase]: 957/1905 cut-off events. [2024-06-28 01:10:55,392 INFO L125 PetriNetUnfolderBase]: For 23880/23923 co-relation queries the response was YES. [2024-06-28 01:10:55,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9597 conditions, 1905 events. 957/1905 cut-off events. For 23880/23923 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11725 event pairs, 319 based on Foata normal form. 6/1896 useless extension candidates. Maximal degree in co-relation 8217. Up to 1205 conditions per place. [2024-06-28 01:10:55,405 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 117 selfloop transitions, 36 changer transitions 0/171 dead transitions. [2024-06-28 01:10:55,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 2058 flow [2024-06-28 01:10:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:10:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:10:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 01:10:55,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-28 01:10:55,406 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 1491 flow. Second operand 6 states and 139 transitions. [2024-06-28 01:10:55,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 2058 flow [2024-06-28 01:10:55,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 171 transitions, 2016 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-28 01:10:55,444 INFO L231 Difference]: Finished difference. Result has 160 places, 143 transitions, 1655 flow [2024-06-28 01:10:55,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1655, PETRI_PLACES=160, PETRI_TRANSITIONS=143} [2024-06-28 01:10:55,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 01:10:55,445 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 143 transitions, 1655 flow [2024-06-28 01:10:55,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:55,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:55,446 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 01:10:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:10:55,446 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:55,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 338171731, now seen corresponding path program 3 times [2024-06-28 01:10:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:55,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348024543] [2024-06-28 01:10:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:55,573 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 01:10:55,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:55,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348024543] [2024-06-28 01:10:55,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348024543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:55,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:55,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:55,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324342375] [2024-06-28 01:10:55,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:55,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:10:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:10:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:10:55,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:55,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 143 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:55,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:55,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:55,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:55,892 INFO L124 PetriNetUnfolderBase]: 936/1860 cut-off events. [2024-06-28 01:10:55,892 INFO L125 PetriNetUnfolderBase]: For 26257/26304 co-relation queries the response was YES. [2024-06-28 01:10:55,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9617 conditions, 1860 events. 936/1860 cut-off events. For 26257/26304 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11343 event pairs, 343 based on Foata normal form. 15/1854 useless extension candidates. Maximal degree in co-relation 8217. Up to 1181 conditions per place. [2024-06-28 01:10:55,905 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 124 selfloop transitions, 37 changer transitions 0/179 dead transitions. [2024-06-28 01:10:55,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 179 transitions, 2190 flow [2024-06-28 01:10:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:10:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:10:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 01:10:55,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-28 01:10:55,907 INFO L175 Difference]: Start difference. First operand has 160 places, 143 transitions, 1655 flow. Second operand 8 states and 170 transitions. [2024-06-28 01:10:55,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 179 transitions, 2190 flow [2024-06-28 01:10:55,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 179 transitions, 2126 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-28 01:10:55,951 INFO L231 Difference]: Finished difference. Result has 169 places, 149 transitions, 1769 flow [2024-06-28 01:10:55,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1769, PETRI_PLACES=169, PETRI_TRANSITIONS=149} [2024-06-28 01:10:55,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 01:10:55,952 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 149 transitions, 1769 flow [2024-06-28 01:10:55,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 01:10:55,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:55,953 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 01:10:55,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:10:55,953 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:55,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash -864699876, now seen corresponding path program 2 times [2024-06-28 01:10:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064979387] [2024-06-28 01:10:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:55,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:56,027 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 01:10:56,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:56,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064979387] [2024-06-28 01:10:56,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064979387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:56,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:56,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:56,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325187537] [2024-06-28 01:10:56,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:56,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:56,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:56,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-28 01:10:56,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 149 transitions, 1769 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 01:10:56,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:56,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-28 01:10:56,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:56,352 INFO L124 PetriNetUnfolderBase]: 640/1528 cut-off events. [2024-06-28 01:10:56,352 INFO L125 PetriNetUnfolderBase]: For 15193/15341 co-relation queries the response was YES. [2024-06-28 01:10:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7330 conditions, 1528 events. 640/1528 cut-off events. For 15193/15341 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10438 event pairs, 192 based on Foata normal form. 17/1483 useless extension candidates. Maximal degree in co-relation 6762. Up to 584 conditions per place. [2024-06-28 01:10:56,363 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 86 selfloop transitions, 33 changer transitions 0/180 dead transitions. [2024-06-28 01:10:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 180 transitions, 2109 flow [2024-06-28 01:10:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:10:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:10:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 01:10:56,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-06-28 01:10:56,364 INFO L175 Difference]: Start difference. First operand has 169 places, 149 transitions, 1769 flow. Second operand 8 states and 204 transitions. [2024-06-28 01:10:56,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 180 transitions, 2109 flow [2024-06-28 01:10:56,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 180 transitions, 2026 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 01:10:56,399 INFO L231 Difference]: Finished difference. Result has 175 places, 148 transitions, 1799 flow [2024-06-28 01:10:56,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1799, PETRI_PLACES=175, PETRI_TRANSITIONS=148} [2024-06-28 01:10:56,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 01:10:56,400 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 148 transitions, 1799 flow [2024-06-28 01:10:56,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 01:10:56,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:56,400 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 01:10:56,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:10:56,401 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:56,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash 643272274, now seen corresponding path program 3 times [2024-06-28 01:10:56,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:56,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784680660] [2024-06-28 01:10:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:56,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:56,462 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 01:10:56,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:56,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784680660] [2024-06-28 01:10:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784680660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:56,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:56,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:10:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123107512] [2024-06-28 01:10:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:56,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:10:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:56,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:10:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:10:56,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-28 01:10:56,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 148 transitions, 1799 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 01:10:56,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:56,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-28 01:10:56,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:56,707 INFO L124 PetriNetUnfolderBase]: 566/1388 cut-off events. [2024-06-28 01:10:56,707 INFO L125 PetriNetUnfolderBase]: For 14417/14533 co-relation queries the response was YES. [2024-06-28 01:10:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6614 conditions, 1388 events. 566/1388 cut-off events. For 14417/14533 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9384 event pairs, 186 based on Foata normal form. 15/1350 useless extension candidates. Maximal degree in co-relation 6109. Up to 584 conditions per place. [2024-06-28 01:10:56,718 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 84 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-06-28 01:10:56,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 165 transitions, 1966 flow [2024-06-28 01:10:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:10:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:10:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-28 01:10:56,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-28 01:10:56,719 INFO L175 Difference]: Start difference. First operand has 175 places, 148 transitions, 1799 flow. Second operand 6 states and 164 transitions. [2024-06-28 01:10:56,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 165 transitions, 1966 flow [2024-06-28 01:10:56,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 165 transitions, 1938 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 01:10:56,750 INFO L231 Difference]: Finished difference. Result has 177 places, 138 transitions, 1694 flow [2024-06-28 01:10:56,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1694, PETRI_PLACES=177, PETRI_TRANSITIONS=138} [2024-06-28 01:10:56,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 01:10:56,750 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 138 transitions, 1694 flow [2024-06-28 01:10:56,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 01:10:56,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:56,751 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 01:10:56,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:10:56,751 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:56,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1235004804, now seen corresponding path program 1 times [2024-06-28 01:10:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:56,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696423207] [2024-06-28 01:10:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:56,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:56,904 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 01:10:56,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:56,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696423207] [2024-06-28 01:10:56,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696423207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:56,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:56,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464899327] [2024-06-28 01:10:56,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:56,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:56,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:56,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:56,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:56,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 138 transitions, 1694 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:56,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:56,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:56,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:57,206 INFO L124 PetriNetUnfolderBase]: 806/1703 cut-off events. [2024-06-28 01:10:57,206 INFO L125 PetriNetUnfolderBase]: For 25820/25825 co-relation queries the response was YES. [2024-06-28 01:10:57,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8916 conditions, 1703 events. 806/1703 cut-off events. For 25820/25825 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10579 event pairs, 356 based on Foata normal form. 4/1696 useless extension candidates. Maximal degree in co-relation 7886. Up to 1454 conditions per place. [2024-06-28 01:10:57,221 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 103 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2024-06-28 01:10:57,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 151 transitions, 1993 flow [2024-06-28 01:10:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:10:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:10:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 01:10:57,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-28 01:10:57,222 INFO L175 Difference]: Start difference. First operand has 177 places, 138 transitions, 1694 flow. Second operand 8 states and 151 transitions. [2024-06-28 01:10:57,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 151 transitions, 1993 flow [2024-06-28 01:10:57,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 151 transitions, 1931 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 01:10:57,267 INFO L231 Difference]: Finished difference. Result has 179 places, 138 transitions, 1686 flow [2024-06-28 01:10:57,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1686, PETRI_PLACES=179, PETRI_TRANSITIONS=138} [2024-06-28 01:10:57,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-28 01:10:57,268 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 138 transitions, 1686 flow [2024-06-28 01:10:57,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:57,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:57,268 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 01:10:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:10:57,268 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:57,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 561860350, now seen corresponding path program 2 times [2024-06-28 01:10:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226448432] [2024-06-28 01:10:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:57,434 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 01:10:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226448432] [2024-06-28 01:10:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226448432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:57,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:57,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:57,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390352177] [2024-06-28 01:10:57,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:57,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:57,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:57,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:57,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 138 transitions, 1686 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:57,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:57,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:57,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:57,765 INFO L124 PetriNetUnfolderBase]: 813/1725 cut-off events. [2024-06-28 01:10:57,765 INFO L125 PetriNetUnfolderBase]: For 27126/27131 co-relation queries the response was YES. [2024-06-28 01:10:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9064 conditions, 1725 events. 813/1725 cut-off events. For 27126/27131 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10851 event pairs, 320 based on Foata normal form. 4/1718 useless extension candidates. Maximal degree in co-relation 8223. Up to 1429 conditions per place. [2024-06-28 01:10:57,780 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 102 selfloop transitions, 32 changer transitions 0/157 dead transitions. [2024-06-28 01:10:57,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 157 transitions, 2061 flow [2024-06-28 01:10:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:10:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:10:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 01:10:57,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293447293447294 [2024-06-28 01:10:57,782 INFO L175 Difference]: Start difference. First operand has 179 places, 138 transitions, 1686 flow. Second operand 9 states and 166 transitions. [2024-06-28 01:10:57,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 157 transitions, 2061 flow [2024-06-28 01:10:57,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 157 transitions, 1983 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 01:10:57,823 INFO L231 Difference]: Finished difference. Result has 180 places, 141 transitions, 1702 flow [2024-06-28 01:10:57,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=180, PETRI_TRANSITIONS=141} [2024-06-28 01:10:57,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-28 01:10:57,824 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 141 transitions, 1702 flow [2024-06-28 01:10:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:57,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:57,824 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 01:10:57,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:10:57,825 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:57,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1926852838, now seen corresponding path program 3 times [2024-06-28 01:10:57,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:57,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939840106] [2024-06-28 01:10:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:57,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:57,970 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 01:10:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939840106] [2024-06-28 01:10:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939840106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:57,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:57,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:10:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933553978] [2024-06-28 01:10:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:57,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:10:57,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:10:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:10:58,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-28 01:10:58,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 141 transitions, 1702 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:58,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:58,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-28 01:10:58,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:58,298 INFO L124 PetriNetUnfolderBase]: 810/1720 cut-off events. [2024-06-28 01:10:58,298 INFO L125 PetriNetUnfolderBase]: For 28563/28568 co-relation queries the response was YES. [2024-06-28 01:10:58,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9063 conditions, 1720 events. 810/1720 cut-off events. For 28563/28568 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10804 event pairs, 321 based on Foata normal form. 4/1713 useless extension candidates. Maximal degree in co-relation 8211. Up to 1427 conditions per place. [2024-06-28 01:10:58,309 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 98 selfloop transitions, 33 changer transitions 0/154 dead transitions. [2024-06-28 01:10:58,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 154 transitions, 2001 flow [2024-06-28 01:10:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:10:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:10:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 01:10:58,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-28 01:10:58,311 INFO L175 Difference]: Start difference. First operand has 180 places, 141 transitions, 1702 flow. Second operand 8 states and 149 transitions. [2024-06-28 01:10:58,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 154 transitions, 2001 flow [2024-06-28 01:10:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 154 transitions, 1913 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 01:10:58,350 INFO L231 Difference]: Finished difference. Result has 182 places, 141 transitions, 1684 flow [2024-06-28 01:10:58,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1684, PETRI_PLACES=182, PETRI_TRANSITIONS=141} [2024-06-28 01:10:58,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 01:10:58,350 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 141 transitions, 1684 flow [2024-06-28 01:10:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:58,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:58,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:58,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:10:58,351 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:58,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash -217586561, now seen corresponding path program 1 times [2024-06-28 01:10:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091814967] [2024-06-28 01:10:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:58,527 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 01:10:58,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:58,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091814967] [2024-06-28 01:10:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091814967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:58,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:58,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:10:58,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613259613] [2024-06-28 01:10:58,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:58,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:10:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:10:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:10:58,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:10:58,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 141 transitions, 1684 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:58,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:58,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:10:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:58,944 INFO L124 PetriNetUnfolderBase]: 859/1762 cut-off events. [2024-06-28 01:10:58,945 INFO L125 PetriNetUnfolderBase]: For 29162/29165 co-relation queries the response was YES. [2024-06-28 01:10:58,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9216 conditions, 1762 events. 859/1762 cut-off events. For 29162/29165 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10731 event pairs, 322 based on Foata normal form. 6/1757 useless extension candidates. Maximal degree in co-relation 8111. Up to 1315 conditions per place. [2024-06-28 01:10:58,954 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-28 01:10:58,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 175 transitions, 2139 flow [2024-06-28 01:10:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:10:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:10:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-28 01:10:58,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47785547785547783 [2024-06-28 01:10:58,956 INFO L175 Difference]: Start difference. First operand has 182 places, 141 transitions, 1684 flow. Second operand 11 states and 205 transitions. [2024-06-28 01:10:58,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 175 transitions, 2139 flow [2024-06-28 01:10:58,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 175 transitions, 2065 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 01:10:58,999 INFO L231 Difference]: Finished difference. Result has 187 places, 142 transitions, 1697 flow [2024-06-28 01:10:59,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1697, PETRI_PLACES=187, PETRI_TRANSITIONS=142} [2024-06-28 01:10:59,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 01:10:59,003 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 142 transitions, 1697 flow [2024-06-28 01:10:59,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:59,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:59,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:59,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:10:59,004 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:59,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2020517001, now seen corresponding path program 2 times [2024-06-28 01:10:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:59,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897977188] [2024-06-28 01:10:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:59,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:59,152 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 01:10:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897977188] [2024-06-28 01:10:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897977188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:59,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:10:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758285992] [2024-06-28 01:10:59,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:10:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:10:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:10:59,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:10:59,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 142 transitions, 1697 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:59,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:59,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:10:59,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:59,568 INFO L124 PetriNetUnfolderBase]: 871/1792 cut-off events. [2024-06-28 01:10:59,568 INFO L125 PetriNetUnfolderBase]: For 31474/31477 co-relation queries the response was YES. [2024-06-28 01:10:59,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1792 events. 871/1792 cut-off events. For 31474/31477 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11031 event pairs, 310 based on Foata normal form. 6/1787 useless extension candidates. Maximal degree in co-relation 8284. Up to 1252 conditions per place. [2024-06-28 01:10:59,580 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 128 selfloop transitions, 47 changer transitions 0/185 dead transitions. [2024-06-28 01:10:59,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 185 transitions, 2243 flow [2024-06-28 01:10:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:10:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:10:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 264 transitions. [2024-06-28 01:10:59,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512820512820513 [2024-06-28 01:10:59,581 INFO L175 Difference]: Start difference. First operand has 187 places, 142 transitions, 1697 flow. Second operand 15 states and 264 transitions. [2024-06-28 01:10:59,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 185 transitions, 2243 flow [2024-06-28 01:10:59,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 185 transitions, 2154 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 01:10:59,626 INFO L231 Difference]: Finished difference. Result has 194 places, 143 transitions, 1718 flow [2024-06-28 01:10:59,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1718, PETRI_PLACES=194, PETRI_TRANSITIONS=143} [2024-06-28 01:10:59,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-28 01:10:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 143 transitions, 1718 flow [2024-06-28 01:10:59,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:59,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:59,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:10:59,627 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:59,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash -205503269, now seen corresponding path program 3 times [2024-06-28 01:10:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802629419] [2024-06-28 01:10:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:59,769 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 01:10:59,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:59,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802629419] [2024-06-28 01:10:59,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802629419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:10:59,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:10:59,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:10:59,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619400763] [2024-06-28 01:10:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:10:59,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:10:59,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:59,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:10:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:10:59,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:10:59,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 143 transitions, 1718 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:10:59,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:59,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:10:59,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:00,182 INFO L124 PetriNetUnfolderBase]: 892/1827 cut-off events. [2024-06-28 01:11:00,182 INFO L125 PetriNetUnfolderBase]: For 33562/33565 co-relation queries the response was YES. [2024-06-28 01:11:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9652 conditions, 1827 events. 892/1827 cut-off events. For 33562/33565 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11257 event pairs, 312 based on Foata normal form. 6/1822 useless extension candidates. Maximal degree in co-relation 8508. Up to 1258 conditions per place. [2024-06-28 01:11:00,195 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 135 selfloop transitions, 50 changer transitions 0/195 dead transitions. [2024-06-28 01:11:00,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 195 transitions, 2331 flow [2024-06-28 01:11:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 296 transitions. [2024-06-28 01:11:00,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464555052790347 [2024-06-28 01:11:00,197 INFO L175 Difference]: Start difference. First operand has 194 places, 143 transitions, 1718 flow. Second operand 17 states and 296 transitions. [2024-06-28 01:11:00,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 195 transitions, 2331 flow [2024-06-28 01:11:00,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 195 transitions, 2222 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-28 01:11:00,246 INFO L231 Difference]: Finished difference. Result has 199 places, 146 transitions, 1748 flow [2024-06-28 01:11:00,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1748, PETRI_PLACES=199, PETRI_TRANSITIONS=146} [2024-06-28 01:11:00,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 01:11:00,247 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 146 transitions, 1748 flow [2024-06-28 01:11:00,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:00,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:00,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:00,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:11:00,247 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:00,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1974452067, now seen corresponding path program 4 times [2024-06-28 01:11:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:00,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836492391] [2024-06-28 01:11:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:00,385 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 01:11:00,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:00,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836492391] [2024-06-28 01:11:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836492391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:00,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:00,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520711242] [2024-06-28 01:11:00,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:00,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:00,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:00,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:00,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 146 transitions, 1748 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:00,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:00,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:00,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:00,793 INFO L124 PetriNetUnfolderBase]: 883/1812 cut-off events. [2024-06-28 01:11:00,794 INFO L125 PetriNetUnfolderBase]: For 33887/33890 co-relation queries the response was YES. [2024-06-28 01:11:00,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9523 conditions, 1812 events. 883/1812 cut-off events. For 33887/33890 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11173 event pairs, 309 based on Foata normal form. 6/1807 useless extension candidates. Maximal degree in co-relation 8582. Up to 1256 conditions per place. [2024-06-28 01:11:00,806 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 135 selfloop transitions, 48 changer transitions 0/193 dead transitions. [2024-06-28 01:11:00,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 193 transitions, 2272 flow [2024-06-28 01:11:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:11:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:11:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-06-28 01:11:00,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-28 01:11:00,810 INFO L175 Difference]: Start difference. First operand has 199 places, 146 transitions, 1748 flow. Second operand 16 states and 284 transitions. [2024-06-28 01:11:00,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 193 transitions, 2272 flow [2024-06-28 01:11:00,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 193 transitions, 2160 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-28 01:11:00,857 INFO L231 Difference]: Finished difference. Result has 201 places, 146 transitions, 1736 flow [2024-06-28 01:11:00,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1736, PETRI_PLACES=201, PETRI_TRANSITIONS=146} [2024-06-28 01:11:00,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 01:11:00,858 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 146 transitions, 1736 flow [2024-06-28 01:11:00,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:00,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:00,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:00,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:11:00,859 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:00,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash 744447675, now seen corresponding path program 5 times [2024-06-28 01:11:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037965595] [2024-06-28 01:11:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:00,995 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 01:11:00,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037965595] [2024-06-28 01:11:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037965595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:00,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:00,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:00,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031825625] [2024-06-28 01:11:00,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:00,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:00,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:01,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:01,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 146 transitions, 1736 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:01,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:01,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:01,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:01,503 INFO L124 PetriNetUnfolderBase]: 955/1953 cut-off events. [2024-06-28 01:11:01,504 INFO L125 PetriNetUnfolderBase]: For 40169/40172 co-relation queries the response was YES. [2024-06-28 01:11:01,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10347 conditions, 1953 events. 955/1953 cut-off events. For 40169/40172 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12284 event pairs, 289 based on Foata normal form. 6/1948 useless extension candidates. Maximal degree in co-relation 9170. Up to 1140 conditions per place. [2024-06-28 01:11:01,517 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 137 selfloop transitions, 66 changer transitions 0/213 dead transitions. [2024-06-28 01:11:01,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 213 transitions, 2604 flow [2024-06-28 01:11:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:11:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:11:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 330 transitions. [2024-06-28 01:11:01,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44534412955465585 [2024-06-28 01:11:01,519 INFO L175 Difference]: Start difference. First operand has 201 places, 146 transitions, 1736 flow. Second operand 19 states and 330 transitions. [2024-06-28 01:11:01,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 213 transitions, 2604 flow [2024-06-28 01:11:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 213 transitions, 2498 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-06-28 01:11:01,573 INFO L231 Difference]: Finished difference. Result has 205 places, 154 transitions, 1848 flow [2024-06-28 01:11:01,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1848, PETRI_PLACES=205, PETRI_TRANSITIONS=154} [2024-06-28 01:11:01,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 01:11:01,573 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 154 transitions, 1848 flow [2024-06-28 01:11:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:01,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:01,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:11:01,574 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:01,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash 743986395, now seen corresponding path program 6 times [2024-06-28 01:11:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:01,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331835803] [2024-06-28 01:11:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:01,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:01,708 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 01:11:01,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:01,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331835803] [2024-06-28 01:11:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331835803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:01,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:01,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023575425] [2024-06-28 01:11:01,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:01,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:01,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:01,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 154 transitions, 1848 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:01,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:01,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:01,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:02,185 INFO L124 PetriNetUnfolderBase]: 946/1938 cut-off events. [2024-06-28 01:11:02,185 INFO L125 PetriNetUnfolderBase]: For 40836/40839 co-relation queries the response was YES. [2024-06-28 01:11:02,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10289 conditions, 1938 events. 946/1938 cut-off events. For 40836/40839 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12191 event pairs, 286 based on Foata normal form. 6/1933 useless extension candidates. Maximal degree in co-relation 9095. Up to 1138 conditions per place. [2024-06-28 01:11:02,201 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 65 changer transitions 0/197 dead transitions. [2024-06-28 01:11:02,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 197 transitions, 2462 flow [2024-06-28 01:11:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 01:11:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 01:11:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 252 transitions. [2024-06-28 01:11:02,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 01:11:02,206 INFO L175 Difference]: Start difference. First operand has 205 places, 154 transitions, 1848 flow. Second operand 14 states and 252 transitions. [2024-06-28 01:11:02,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 197 transitions, 2462 flow [2024-06-28 01:11:02,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 197 transitions, 2292 flow, removed 16 selfloop flow, removed 13 redundant places. [2024-06-28 01:11:02,262 INFO L231 Difference]: Finished difference. Result has 206 places, 154 transitions, 1812 flow [2024-06-28 01:11:02,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1812, PETRI_PLACES=206, PETRI_TRANSITIONS=154} [2024-06-28 01:11:02,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 01:11:02,271 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 154 transitions, 1812 flow [2024-06-28 01:11:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:02,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:02,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:11:02,280 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:02,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 968717531, now seen corresponding path program 7 times [2024-06-28 01:11:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:02,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414282370] [2024-06-28 01:11:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:02,402 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 01:11:02,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:02,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414282370] [2024-06-28 01:11:02,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414282370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:02,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:02,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:11:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789665038] [2024-06-28 01:11:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:11:02,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:11:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:11:02,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:02,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 154 transitions, 1812 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:11:02,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:02,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:02,756 INFO L124 PetriNetUnfolderBase]: 937/1923 cut-off events. [2024-06-28 01:11:02,757 INFO L125 PetriNetUnfolderBase]: For 40600/40603 co-relation queries the response was YES. [2024-06-28 01:11:02,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 1923 events. 937/1923 cut-off events. For 40600/40603 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12110 event pairs, 279 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 8904. Up to 1136 conditions per place. [2024-06-28 01:11:02,822 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 61 changer transitions 0/185 dead transitions. [2024-06-28 01:11:02,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 185 transitions, 2316 flow [2024-06-28 01:11:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:11:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:11:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 01:11:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794871794871795 [2024-06-28 01:11:02,824 INFO L175 Difference]: Start difference. First operand has 206 places, 154 transitions, 1812 flow. Second operand 10 states and 187 transitions. [2024-06-28 01:11:02,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 185 transitions, 2316 flow [2024-06-28 01:11:02,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 185 transitions, 2186 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-28 01:11:02,878 INFO L231 Difference]: Finished difference. Result has 203 places, 154 transitions, 1808 flow [2024-06-28 01:11:02,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1808, PETRI_PLACES=203, PETRI_TRANSITIONS=154} [2024-06-28 01:11:02,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-28 01:11:02,879 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 154 transitions, 1808 flow [2024-06-28 01:11:02,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:11:02,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:02,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:02,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 01:11:02,880 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:02,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash 759656895, now seen corresponding path program 8 times [2024-06-28 01:11:02,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:02,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070785508] [2024-06-28 01:11:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:03,033 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 01:11:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070785508] [2024-06-28 01:11:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070785508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:03,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:03,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342242255] [2024-06-28 01:11:03,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:03,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:03,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:03,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 154 transitions, 1808 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:03,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:03,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:03,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:03,496 INFO L124 PetriNetUnfolderBase]: 949/1947 cut-off events. [2024-06-28 01:11:03,496 INFO L125 PetriNetUnfolderBase]: For 42904/42907 co-relation queries the response was YES. [2024-06-28 01:11:03,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10269 conditions, 1947 events. 949/1947 cut-off events. For 42904/42907 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12275 event pairs, 293 based on Foata normal form. 6/1942 useless extension candidates. Maximal degree in co-relation 9276. Up to 1140 conditions per place. [2024-06-28 01:11:03,510 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 119 selfloop transitions, 70 changer transitions 0/199 dead transitions. [2024-06-28 01:11:03,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 199 transitions, 2446 flow [2024-06-28 01:11:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:11:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:11:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 263 transitions. [2024-06-28 01:11:03,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495726495726496 [2024-06-28 01:11:03,511 INFO L175 Difference]: Start difference. First operand has 203 places, 154 transitions, 1808 flow. Second operand 15 states and 263 transitions. [2024-06-28 01:11:03,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 199 transitions, 2446 flow [2024-06-28 01:11:03,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 199 transitions, 2321 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 01:11:03,569 INFO L231 Difference]: Finished difference. Result has 211 places, 155 transitions, 1837 flow [2024-06-28 01:11:03,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1837, PETRI_PLACES=211, PETRI_TRANSITIONS=155} [2024-06-28 01:11:03,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 01:11:03,569 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 155 transitions, 1837 flow [2024-06-28 01:11:03,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:03,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:03,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 01:11:03,570 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:03,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1577226921, now seen corresponding path program 9 times [2024-06-28 01:11:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306705118] [2024-06-28 01:11:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:03,740 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 01:11:03,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306705118] [2024-06-28 01:11:03,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306705118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:03,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:03,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155339514] [2024-06-28 01:11:03,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:03,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:03,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:03,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:03,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 155 transitions, 1837 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:03,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:03,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:03,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:04,186 INFO L124 PetriNetUnfolderBase]: 940/1932 cut-off events. [2024-06-28 01:11:04,186 INFO L125 PetriNetUnfolderBase]: For 43018/43021 co-relation queries the response was YES. [2024-06-28 01:11:04,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10140 conditions, 1932 events. 940/1932 cut-off events. For 43018/43021 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12190 event pairs, 283 based on Foata normal form. 6/1927 useless extension candidates. Maximal degree in co-relation 9134. Up to 1138 conditions per place. [2024-06-28 01:11:04,200 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 67 changer transitions 0/204 dead transitions. [2024-06-28 01:11:04,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 204 transitions, 2435 flow [2024-06-28 01:11:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 295 transitions. [2024-06-28 01:11:04,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444947209653092 [2024-06-28 01:11:04,201 INFO L175 Difference]: Start difference. First operand has 211 places, 155 transitions, 1837 flow. Second operand 17 states and 295 transitions. [2024-06-28 01:11:04,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 204 transitions, 2435 flow [2024-06-28 01:11:04,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 204 transitions, 2243 flow, removed 11 selfloop flow, removed 14 redundant places. [2024-06-28 01:11:04,267 INFO L231 Difference]: Finished difference. Result has 214 places, 155 transitions, 1785 flow [2024-06-28 01:11:04,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1785, PETRI_PLACES=214, PETRI_TRANSITIONS=155} [2024-06-28 01:11:04,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 01:11:04,268 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 155 transitions, 1785 flow [2024-06-28 01:11:04,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:04,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:04,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:04,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 01:11:04,268 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:04,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:04,269 INFO L85 PathProgramCache]: Analyzing trace with hash 397089311, now seen corresponding path program 10 times [2024-06-28 01:11:04,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:04,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604854266] [2024-06-28 01:11:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:04,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:11:04,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:04,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604854266] [2024-06-28 01:11:04,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604854266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:04,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:04,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:04,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087858967] [2024-06-28 01:11:04,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:04,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:04,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:04,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 155 transitions, 1785 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:04,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:04,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:04,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:04,861 INFO L124 PetriNetUnfolderBase]: 931/1917 cut-off events. [2024-06-28 01:11:04,861 INFO L125 PetriNetUnfolderBase]: For 40303/40306 co-relation queries the response was YES. [2024-06-28 01:11:04,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9754 conditions, 1917 events. 931/1917 cut-off events. For 40303/40306 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12083 event pairs, 286 based on Foata normal form. 6/1912 useless extension candidates. Maximal degree in co-relation 8532. Up to 1136 conditions per place. [2024-06-28 01:11:04,874 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 117 selfloop transitions, 70 changer transitions 0/197 dead transitions. [2024-06-28 01:11:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 197 transitions, 2293 flow [2024-06-28 01:11:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:11:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:11:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 261 transitions. [2024-06-28 01:11:04,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-06-28 01:11:04,875 INFO L175 Difference]: Start difference. First operand has 214 places, 155 transitions, 1785 flow. Second operand 15 states and 261 transitions. [2024-06-28 01:11:04,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 197 transitions, 2293 flow [2024-06-28 01:11:04,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 197 transitions, 2155 flow, removed 2 selfloop flow, removed 16 redundant places. [2024-06-28 01:11:04,926 INFO L231 Difference]: Finished difference. Result has 213 places, 155 transitions, 1791 flow [2024-06-28 01:11:04,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1791, PETRI_PLACES=213, PETRI_TRANSITIONS=155} [2024-06-28 01:11:04,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-28 01:11:04,926 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 155 transitions, 1791 flow [2024-06-28 01:11:04,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:04,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:04,927 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] [2024-06-28 01:11:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 01:11:04,927 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:04,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1156488206, now seen corresponding path program 1 times [2024-06-28 01:11:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293155409] [2024-06-28 01:11:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:04,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:05,068 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 01:11:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293155409] [2024-06-28 01:11:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293155409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:05,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:05,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:11:05,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578047390] [2024-06-28 01:11:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:11:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:11:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:11:05,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:05,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 155 transitions, 1791 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:11:05,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:05,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:05,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:05,401 INFO L124 PetriNetUnfolderBase]: 895/1857 cut-off events. [2024-06-28 01:11:05,401 INFO L125 PetriNetUnfolderBase]: For 39691/39694 co-relation queries the response was YES. [2024-06-28 01:11:05,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8917 conditions, 1857 events. 895/1857 cut-off events. For 39691/39694 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11664 event pairs, 311 based on Foata normal form. 24/1870 useless extension candidates. Maximal degree in co-relation 8385. Up to 1234 conditions per place. [2024-06-28 01:11:05,414 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 136 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2024-06-28 01:11:05,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 184 transitions, 2252 flow [2024-06-28 01:11:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:11:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:11:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 01:11:05,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928774928774929 [2024-06-28 01:11:05,415 INFO L175 Difference]: Start difference. First operand has 213 places, 155 transitions, 1791 flow. Second operand 9 states and 173 transitions. [2024-06-28 01:11:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 184 transitions, 2252 flow [2024-06-28 01:11:05,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 184 transitions, 2094 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-28 01:11:05,467 INFO L231 Difference]: Finished difference. Result has 208 places, 155 transitions, 1718 flow [2024-06-28 01:11:05,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1718, PETRI_PLACES=208, PETRI_TRANSITIONS=155} [2024-06-28 01:11:05,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-28 01:11:05,468 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 155 transitions, 1718 flow [2024-06-28 01:11:05,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:11:05,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:05,468 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] [2024-06-28 01:11:05,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:11:05,469 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:05,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1338446270, now seen corresponding path program 1 times [2024-06-28 01:11:05,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:05,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304180722] [2024-06-28 01:11:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:05,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:05,550 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 01:11:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304180722] [2024-06-28 01:11:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304180722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:05,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:05,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:11:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999802257] [2024-06-28 01:11:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:11:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:11:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:11:05,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-28 01:11:05,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 155 transitions, 1718 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 01:11:05,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:05,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-28 01:11:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:05,807 INFO L124 PetriNetUnfolderBase]: 575/1420 cut-off events. [2024-06-28 01:11:05,807 INFO L125 PetriNetUnfolderBase]: For 14516/14519 co-relation queries the response was YES. [2024-06-28 01:11:05,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6172 conditions, 1420 events. 575/1420 cut-off events. For 14516/14519 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9738 event pairs, 183 based on Foata normal form. 16/1412 useless extension candidates. Maximal degree in co-relation 5734. Up to 281 conditions per place. [2024-06-28 01:11:05,818 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 61 selfloop transitions, 55 changer transitions 0/170 dead transitions. [2024-06-28 01:11:05,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 170 transitions, 1931 flow [2024-06-28 01:11:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:11:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:11:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-28 01:11:05,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182336182336182 [2024-06-28 01:11:05,819 INFO L175 Difference]: Start difference. First operand has 208 places, 155 transitions, 1718 flow. Second operand 9 states and 217 transitions. [2024-06-28 01:11:05,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 170 transitions, 1931 flow [2024-06-28 01:11:05,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 170 transitions, 1833 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 01:11:05,859 INFO L231 Difference]: Finished difference. Result has 209 places, 141 transitions, 1628 flow [2024-06-28 01:11:05,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1628, PETRI_PLACES=209, PETRI_TRANSITIONS=141} [2024-06-28 01:11:05,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 01:11:05,862 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 141 transitions, 1628 flow [2024-06-28 01:11:05,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 01:11:05,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:05,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:05,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 01:11:05,862 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:05,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:05,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1395898795, now seen corresponding path program 1 times [2024-06-28 01:11:05,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:05,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133194248] [2024-06-28 01:11:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:05,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:06,059 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 01:11:06,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:06,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133194248] [2024-06-28 01:11:06,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133194248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:06,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531523179] [2024-06-28 01:11:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:06,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:06,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 141 transitions, 1628 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:06,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:06,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:06,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:06,477 INFO L124 PetriNetUnfolderBase]: 808/1746 cut-off events. [2024-06-28 01:11:06,477 INFO L125 PetriNetUnfolderBase]: For 29156/29159 co-relation queries the response was YES. [2024-06-28 01:11:06,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8225 conditions, 1746 events. 808/1746 cut-off events. For 29156/29159 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11184 event pairs, 271 based on Foata normal form. 4/1739 useless extension candidates. Maximal degree in co-relation 7460. Up to 1225 conditions per place. [2024-06-28 01:11:06,486 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 143 selfloop transitions, 35 changer transitions 0/188 dead transitions. [2024-06-28 01:11:06,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 188 transitions, 2235 flow [2024-06-28 01:11:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 01:11:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 01:11:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-28 01:11:06,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635108481262327 [2024-06-28 01:11:06,488 INFO L175 Difference]: Start difference. First operand has 209 places, 141 transitions, 1628 flow. Second operand 13 states and 235 transitions. [2024-06-28 01:11:06,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 188 transitions, 2235 flow [2024-06-28 01:11:06,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 188 transitions, 2153 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:11:06,538 INFO L231 Difference]: Finished difference. Result has 218 places, 145 transitions, 1677 flow [2024-06-28 01:11:06,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1677, PETRI_PLACES=218, PETRI_TRANSITIONS=145} [2024-06-28 01:11:06,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-28 01:11:06,539 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 145 transitions, 1677 flow [2024-06-28 01:11:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:06,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:06,540 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] [2024-06-28 01:11:06,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:11:06,540 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:06,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 10587619, now seen corresponding path program 2 times [2024-06-28 01:11:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346049934] [2024-06-28 01:11:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:06,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:06,727 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 01:11:06,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:06,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346049934] [2024-06-28 01:11:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346049934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:06,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:06,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:06,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717759381] [2024-06-28 01:11:06,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:06,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:06,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:06,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:06,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:06,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 145 transitions, 1677 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:06,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:06,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:06,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:07,214 INFO L124 PetriNetUnfolderBase]: 887/1918 cut-off events. [2024-06-28 01:11:07,215 INFO L125 PetriNetUnfolderBase]: For 39055/39058 co-relation queries the response was YES. [2024-06-28 01:11:07,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9452 conditions, 1918 events. 887/1918 cut-off events. For 39055/39058 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12552 event pairs, 279 based on Foata normal form. 4/1911 useless extension candidates. Maximal degree in co-relation 8942. Up to 1136 conditions per place. [2024-06-28 01:11:07,229 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 163 selfloop transitions, 41 changer transitions 0/214 dead transitions. [2024-06-28 01:11:07,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 214 transitions, 2633 flow [2024-06-28 01:11:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:11:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:11:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 296 transitions. [2024-06-28 01:11:07,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-28 01:11:07,231 INFO L175 Difference]: Start difference. First operand has 218 places, 145 transitions, 1677 flow. Second operand 16 states and 296 transitions. [2024-06-28 01:11:07,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 214 transitions, 2633 flow [2024-06-28 01:11:07,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 214 transitions, 2547 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 01:11:07,305 INFO L231 Difference]: Finished difference. Result has 232 places, 152 transitions, 1794 flow [2024-06-28 01:11:07,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1794, PETRI_PLACES=232, PETRI_TRANSITIONS=152} [2024-06-28 01:11:07,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-28 01:11:07,306 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 152 transitions, 1794 flow [2024-06-28 01:11:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:07,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:07,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:11:07,306 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:07,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1144245683, now seen corresponding path program 3 times [2024-06-28 01:11:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000453693] [2024-06-28 01:11:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:07,478 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 01:11:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000453693] [2024-06-28 01:11:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000453693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:07,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:07,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383601497] [2024-06-28 01:11:07,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:07,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:07,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 152 transitions, 1794 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:07,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:07,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:07,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:07,980 INFO L124 PetriNetUnfolderBase]: 890/1934 cut-off events. [2024-06-28 01:11:07,980 INFO L125 PetriNetUnfolderBase]: For 41101/41104 co-relation queries the response was YES. [2024-06-28 01:11:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9654 conditions, 1934 events. 890/1934 cut-off events. For 41101/41104 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12660 event pairs, 280 based on Foata normal form. 4/1927 useless extension candidates. Maximal degree in co-relation 9140. Up to 1136 conditions per place. [2024-06-28 01:11:07,997 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 161 selfloop transitions, 41 changer transitions 0/212 dead transitions. [2024-06-28 01:11:07,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 212 transitions, 2607 flow [2024-06-28 01:11:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:11:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:11:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 279 transitions. [2024-06-28 01:11:08,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-28 01:11:08,003 INFO L175 Difference]: Start difference. First operand has 232 places, 152 transitions, 1794 flow. Second operand 15 states and 279 transitions. [2024-06-28 01:11:08,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 212 transitions, 2607 flow [2024-06-28 01:11:08,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 212 transitions, 2508 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 01:11:08,095 INFO L231 Difference]: Finished difference. Result has 244 places, 155 transitions, 1824 flow [2024-06-28 01:11:08,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1824, PETRI_PLACES=244, PETRI_TRANSITIONS=155} [2024-06-28 01:11:08,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-28 01:11:08,096 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 155 transitions, 1824 flow [2024-06-28 01:11:08,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:08,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:08,096 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] [2024-06-28 01:11:08,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 01:11:08,096 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:08,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 972350439, now seen corresponding path program 4 times [2024-06-28 01:11:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:08,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803613076] [2024-06-28 01:11:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:08,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:08,255 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 01:11:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803613076] [2024-06-28 01:11:08,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803613076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:08,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:08,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:08,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913635552] [2024-06-28 01:11:08,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:08,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:08,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:08,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:08,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 155 transitions, 1824 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:08,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:08,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:08,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:08,670 INFO L124 PetriNetUnfolderBase]: 884/1924 cut-off events. [2024-06-28 01:11:08,670 INFO L125 PetriNetUnfolderBase]: For 41105/41108 co-relation queries the response was YES. [2024-06-28 01:11:08,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9550 conditions, 1924 events. 884/1924 cut-off events. For 41105/41108 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12611 event pairs, 288 based on Foata normal form. 4/1917 useless extension candidates. Maximal degree in co-relation 8818. Up to 1136 conditions per place. [2024-06-28 01:11:08,685 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 154 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-28 01:11:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 204 transitions, 2506 flow [2024-06-28 01:11:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 01:11:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 01:11:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-28 01:11:08,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48520710059171596 [2024-06-28 01:11:08,687 INFO L175 Difference]: Start difference. First operand has 244 places, 155 transitions, 1824 flow. Second operand 13 states and 246 transitions. [2024-06-28 01:11:08,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 204 transitions, 2506 flow [2024-06-28 01:11:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 204 transitions, 2410 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 01:11:08,840 INFO L231 Difference]: Finished difference. Result has 249 places, 155 transitions, 1812 flow [2024-06-28 01:11:08,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1812, PETRI_PLACES=249, PETRI_TRANSITIONS=155} [2024-06-28 01:11:08,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 01:11:08,841 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 155 transitions, 1812 flow [2024-06-28 01:11:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:08,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:08,842 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] [2024-06-28 01:11:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 01:11:08,842 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:08,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 757942733, now seen corresponding path program 5 times [2024-06-28 01:11:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390300589] [2024-06-28 01:11:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:08,985 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 01:11:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:08,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390300589] [2024-06-28 01:11:08,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390300589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:08,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:08,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147042039] [2024-06-28 01:11:08,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:08,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:08,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:09,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:09,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 155 transitions, 1812 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:11:09,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:09,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:09,368 INFO L124 PetriNetUnfolderBase]: 887/1942 cut-off events. [2024-06-28 01:11:09,368 INFO L125 PetriNetUnfolderBase]: For 43357/43360 co-relation queries the response was YES. [2024-06-28 01:11:09,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9583 conditions, 1942 events. 887/1942 cut-off events. For 43357/43360 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12814 event pairs, 214 based on Foata normal form. 4/1933 useless extension candidates. Maximal degree in co-relation 9059. Up to 535 conditions per place. [2024-06-28 01:11:09,383 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 145 selfloop transitions, 49 changer transitions 0/204 dead transitions. [2024-06-28 01:11:09,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 204 transitions, 2568 flow [2024-06-28 01:11:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:11:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:11:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-28 01:11:09,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2024-06-28 01:11:09,384 INFO L175 Difference]: Start difference. First operand has 249 places, 155 transitions, 1812 flow. Second operand 12 states and 230 transitions. [2024-06-28 01:11:09,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 204 transitions, 2568 flow [2024-06-28 01:11:09,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 204 transitions, 2480 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-28 01:11:09,495 INFO L231 Difference]: Finished difference. Result has 249 places, 156 transitions, 1854 flow [2024-06-28 01:11:09,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1854, PETRI_PLACES=249, PETRI_TRANSITIONS=156} [2024-06-28 01:11:09,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 01:11:09,496 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 156 transitions, 1854 flow [2024-06-28 01:11:09,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:11:09,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:09,499 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] [2024-06-28 01:11:09,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:11:09,499 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:09,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1785996785, now seen corresponding path program 6 times [2024-06-28 01:11:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:09,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850425012] [2024-06-28 01:11:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:09,657 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 01:11:09,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:09,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850425012] [2024-06-28 01:11:09,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850425012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:09,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:09,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:09,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590910132] [2024-06-28 01:11:09,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:09,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:09,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:09,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 156 transitions, 1854 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:09,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:09,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:10,180 INFO L124 PetriNetUnfolderBase]: 957/2092 cut-off events. [2024-06-28 01:11:10,181 INFO L125 PetriNetUnfolderBase]: For 48590/48593 co-relation queries the response was YES. [2024-06-28 01:11:10,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10465 conditions, 2092 events. 957/2092 cut-off events. For 48590/48593 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14147 event pairs, 260 based on Foata normal form. 4/2083 useless extension candidates. Maximal degree in co-relation 9933. Up to 808 conditions per place. [2024-06-28 01:11:10,196 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 158 selfloop transitions, 64 changer transitions 0/232 dead transitions. [2024-06-28 01:11:10,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 232 transitions, 2996 flow [2024-06-28 01:11:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 311 transitions. [2024-06-28 01:11:10,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46907993966817496 [2024-06-28 01:11:10,197 INFO L175 Difference]: Start difference. First operand has 249 places, 156 transitions, 1854 flow. Second operand 17 states and 311 transitions. [2024-06-28 01:11:10,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 232 transitions, 2996 flow [2024-06-28 01:11:10,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 232 transitions, 2850 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 01:11:10,301 INFO L231 Difference]: Finished difference. Result has 260 places, 165 transitions, 1983 flow [2024-06-28 01:11:10,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1983, PETRI_PLACES=260, PETRI_TRANSITIONS=165} [2024-06-28 01:11:10,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-28 01:11:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 165 transitions, 1983 flow [2024-06-28 01:11:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:10,303 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] [2024-06-28 01:11:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:11:10,303 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1045224167, now seen corresponding path program 7 times [2024-06-28 01:11:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160667253] [2024-06-28 01:11:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:10,464 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 01:11:10,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:10,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160667253] [2024-06-28 01:11:10,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160667253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:10,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:10,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630105584] [2024-06-28 01:11:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:10,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:10,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:10,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:10,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 165 transitions, 1983 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:10,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:10,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:10,929 INFO L124 PetriNetUnfolderBase]: 984/2153 cut-off events. [2024-06-28 01:11:10,929 INFO L125 PetriNetUnfolderBase]: For 55122/55125 co-relation queries the response was YES. [2024-06-28 01:11:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 2153 events. 984/2153 cut-off events. For 55122/55125 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14621 event pairs, 278 based on Foata normal form. 4/2144 useless extension candidates. Maximal degree in co-relation 9981. Up to 924 conditions per place. [2024-06-28 01:11:10,949 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 145 selfloop transitions, 71 changer transitions 0/226 dead transitions. [2024-06-28 01:11:10,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 226 transitions, 2885 flow [2024-06-28 01:11:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 01:11:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 01:11:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2024-06-28 01:11:10,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48534798534798534 [2024-06-28 01:11:10,951 INFO L175 Difference]: Start difference. First operand has 260 places, 165 transitions, 1983 flow. Second operand 14 states and 265 transitions. [2024-06-28 01:11:10,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 226 transitions, 2885 flow [2024-06-28 01:11:11,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 226 transitions, 2706 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-28 01:11:11,059 INFO L231 Difference]: Finished difference. Result has 265 places, 170 transitions, 2021 flow [2024-06-28 01:11:11,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2021, PETRI_PLACES=265, PETRI_TRANSITIONS=170} [2024-06-28 01:11:11,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-28 01:11:11,060 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 170 transitions, 2021 flow [2024-06-28 01:11:11,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:11,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:11,060 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] [2024-06-28 01:11:11,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 01:11:11,061 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:11,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1623554023, now seen corresponding path program 8 times [2024-06-28 01:11:11,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:11,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7157029] [2024-06-28 01:11:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:11,193 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 01:11:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7157029] [2024-06-28 01:11:11,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7157029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:11,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:11,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111681076] [2024-06-28 01:11:11,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:11,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:11,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:11,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:11,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 170 transitions, 2021 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:11,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:11,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:11,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:11,696 INFO L124 PetriNetUnfolderBase]: 995/2181 cut-off events. [2024-06-28 01:11:11,697 INFO L125 PetriNetUnfolderBase]: For 58481/58484 co-relation queries the response was YES. [2024-06-28 01:11:11,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11040 conditions, 2181 events. 995/2181 cut-off events. For 58481/58484 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14872 event pairs, 279 based on Foata normal form. 4/2172 useless extension candidates. Maximal degree in co-relation 10490. Up to 808 conditions per place. [2024-06-28 01:11:11,713 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 171 selfloop transitions, 63 changer transitions 0/244 dead transitions. [2024-06-28 01:11:11,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 244 transitions, 3134 flow [2024-06-28 01:11:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 321 transitions. [2024-06-28 01:11:11,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841628959276018 [2024-06-28 01:11:11,715 INFO L175 Difference]: Start difference. First operand has 265 places, 170 transitions, 2021 flow. Second operand 17 states and 321 transitions. [2024-06-28 01:11:11,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 244 transitions, 3134 flow [2024-06-28 01:11:11,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 244 transitions, 3044 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 01:11:11,840 INFO L231 Difference]: Finished difference. Result has 278 places, 173 transitions, 2104 flow [2024-06-28 01:11:11,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2104, PETRI_PLACES=278, PETRI_TRANSITIONS=173} [2024-06-28 01:11:11,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-28 01:11:11,840 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 173 transitions, 2104 flow [2024-06-28 01:11:11,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:11,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:11,841 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] [2024-06-28 01:11:11,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 01:11:11,841 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:11,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash 938042291, now seen corresponding path program 9 times [2024-06-28 01:11:11,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:11,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926600069] [2024-06-28 01:11:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:11,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:11,979 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 01:11:11,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:11,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926600069] [2024-06-28 01:11:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926600069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:11,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:11,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:11,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766706208] [2024-06-28 01:11:11,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:11,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:11,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:11,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:12,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:12,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 173 transitions, 2104 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:12,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:12,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:12,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:12,531 INFO L124 PetriNetUnfolderBase]: 998/2200 cut-off events. [2024-06-28 01:11:12,532 INFO L125 PetriNetUnfolderBase]: For 61680/61683 co-relation queries the response was YES. [2024-06-28 01:11:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11182 conditions, 2200 events. 998/2200 cut-off events. For 61680/61683 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15097 event pairs, 274 based on Foata normal form. 4/2191 useless extension candidates. Maximal degree in co-relation 10342. Up to 975 conditions per place. [2024-06-28 01:11:12,547 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 150 selfloop transitions, 73 changer transitions 0/233 dead transitions. [2024-06-28 01:11:12,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 233 transitions, 2978 flow [2024-06-28 01:11:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:11:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:11:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 292 transitions. [2024-06-28 01:11:12,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-28 01:11:12,549 INFO L175 Difference]: Start difference. First operand has 278 places, 173 transitions, 2104 flow. Second operand 16 states and 292 transitions. [2024-06-28 01:11:12,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 233 transitions, 2978 flow [2024-06-28 01:11:12,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 233 transitions, 2857 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 01:11:12,672 INFO L231 Difference]: Finished difference. Result has 285 places, 173 transitions, 2133 flow [2024-06-28 01:11:12,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2133, PETRI_PLACES=285, PETRI_TRANSITIONS=173} [2024-06-28 01:11:12,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-28 01:11:12,673 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 173 transitions, 2133 flow [2024-06-28 01:11:12,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:12,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:12,674 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] [2024-06-28 01:11:12,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 01:11:12,674 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:12,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 194692241, now seen corresponding path program 10 times [2024-06-28 01:11:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:12,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586727594] [2024-06-28 01:11:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:12,835 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 01:11:12,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586727594] [2024-06-28 01:11:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586727594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:12,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:12,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871117313] [2024-06-28 01:11:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:12,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:12,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:12,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 173 transitions, 2133 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:12,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:12,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:12,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:13,293 INFO L124 PetriNetUnfolderBase]: 992/2187 cut-off events. [2024-06-28 01:11:13,293 INFO L125 PetriNetUnfolderBase]: For 61374/61377 co-relation queries the response was YES. [2024-06-28 01:11:13,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11103 conditions, 2187 events. 992/2187 cut-off events. For 61374/61377 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14943 event pairs, 288 based on Foata normal form. 4/2178 useless extension candidates. Maximal degree in co-relation 10538. Up to 808 conditions per place. [2024-06-28 01:11:13,309 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 163 selfloop transitions, 62 changer transitions 0/235 dead transitions. [2024-06-28 01:11:13,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 235 transitions, 3026 flow [2024-06-28 01:11:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:11:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:11:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 287 transitions. [2024-06-28 01:11:13,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905982905982906 [2024-06-28 01:11:13,310 INFO L175 Difference]: Start difference. First operand has 285 places, 173 transitions, 2133 flow. Second operand 15 states and 287 transitions. [2024-06-28 01:11:13,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 235 transitions, 3026 flow [2024-06-28 01:11:13,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 235 transitions, 2829 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-28 01:11:13,463 INFO L231 Difference]: Finished difference. Result has 287 places, 173 transitions, 2064 flow [2024-06-28 01:11:13,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2064, PETRI_PLACES=287, PETRI_TRANSITIONS=173} [2024-06-28 01:11:13,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 01:11:13,464 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 173 transitions, 2064 flow [2024-06-28 01:11:13,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:13,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:13,464 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] [2024-06-28 01:11:13,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 01:11:13,464 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:13,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash 692393879, now seen corresponding path program 11 times [2024-06-28 01:11:13,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:13,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021995912] [2024-06-28 01:11:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:13,639 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 01:11:13,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021995912] [2024-06-28 01:11:13,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021995912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:13,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197667651] [2024-06-28 01:11:13,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:13,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:13,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:13,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 173 transitions, 2064 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:11:13,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:13,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:13,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:13,971 INFO L124 PetriNetUnfolderBase]: 986/2175 cut-off events. [2024-06-28 01:11:13,972 INFO L125 PetriNetUnfolderBase]: For 61151/61154 co-relation queries the response was YES. [2024-06-28 01:11:13,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10808 conditions, 2175 events. 986/2175 cut-off events. For 61151/61154 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14818 event pairs, 430 based on Foata normal form. 4/2168 useless extension candidates. Maximal degree in co-relation 10255. Up to 1500 conditions per place. [2024-06-28 01:11:13,987 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 159 selfloop transitions, 39 changer transitions 0/208 dead transitions. [2024-06-28 01:11:13,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 208 transitions, 2658 flow [2024-06-28 01:11:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:11:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:11:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 01:11:13,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948717948717949 [2024-06-28 01:11:13,988 INFO L175 Difference]: Start difference. First operand has 287 places, 173 transitions, 2064 flow. Second operand 10 states and 193 transitions. [2024-06-28 01:11:13,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 208 transitions, 2658 flow [2024-06-28 01:11:14,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 208 transitions, 2504 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-28 01:11:14,136 INFO L231 Difference]: Finished difference. Result has 282 places, 173 transitions, 1994 flow [2024-06-28 01:11:14,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1994, PETRI_PLACES=282, PETRI_TRANSITIONS=173} [2024-06-28 01:11:14,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 01:11:14,136 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 173 transitions, 1994 flow [2024-06-28 01:11:14,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:11:14,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:14,137 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] [2024-06-28 01:11:14,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 01:11:14,137 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:14,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1844801825, now seen corresponding path program 1 times [2024-06-28 01:11:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:14,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961101357] [2024-06-28 01:11:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:14,283 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 01:11:14,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:14,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961101357] [2024-06-28 01:11:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961101357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:14,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:14,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933978922] [2024-06-28 01:11:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:14,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:14,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:14,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 173 transitions, 1994 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:14,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:14,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:14,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:14,783 INFO L124 PetriNetUnfolderBase]: 1003/2218 cut-off events. [2024-06-28 01:11:14,783 INFO L125 PetriNetUnfolderBase]: For 66965/66968 co-relation queries the response was YES. [2024-06-28 01:11:14,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11007 conditions, 2218 events. 1003/2218 cut-off events. For 66965/66968 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15232 event pairs, 466 based on Foata normal form. 4/2211 useless extension candidates. Maximal degree in co-relation 10134. Up to 1684 conditions per place. [2024-06-28 01:11:14,797 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 169 selfloop transitions, 35 changer transitions 0/214 dead transitions. [2024-06-28 01:11:14,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 214 transitions, 2639 flow [2024-06-28 01:11:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 01:11:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 01:11:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-28 01:11:14,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 01:11:14,798 INFO L175 Difference]: Start difference. First operand has 282 places, 173 transitions, 1994 flow. Second operand 13 states and 234 transitions. [2024-06-28 01:11:14,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 214 transitions, 2639 flow [2024-06-28 01:11:14,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 214 transitions, 2511 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-28 01:11:14,975 INFO L231 Difference]: Finished difference. Result has 284 places, 174 transitions, 1951 flow [2024-06-28 01:11:14,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1951, PETRI_PLACES=284, PETRI_TRANSITIONS=174} [2024-06-28 01:11:14,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 01:11:14,976 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 174 transitions, 1951 flow [2024-06-28 01:11:14,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:14,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:14,976 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] [2024-06-28 01:11:14,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 01:11:14,977 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:14,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash -483042055, now seen corresponding path program 2 times [2024-06-28 01:11:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:14,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684789907] [2024-06-28 01:11:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:14,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:15,119 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 01:11:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684789907] [2024-06-28 01:11:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684789907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:15,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065492167] [2024-06-28 01:11:15,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:15,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:15,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 174 transitions, 1951 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:15,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:15,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:15,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:15,680 INFO L124 PetriNetUnfolderBase]: 1043/2312 cut-off events. [2024-06-28 01:11:15,680 INFO L125 PetriNetUnfolderBase]: For 80457/80460 co-relation queries the response was YES. [2024-06-28 01:11:15,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11703 conditions, 2312 events. 1043/2312 cut-off events. For 80457/80460 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16029 event pairs, 461 based on Foata normal form. 4/2305 useless extension candidates. Maximal degree in co-relation 11167. Up to 1577 conditions per place. [2024-06-28 01:11:15,697 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 187 selfloop transitions, 43 changer transitions 0/240 dead transitions. [2024-06-28 01:11:15,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 240 transitions, 3009 flow [2024-06-28 01:11:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:11:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:11:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 335 transitions. [2024-06-28 01:11:15,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45209176788124156 [2024-06-28 01:11:15,698 INFO L175 Difference]: Start difference. First operand has 284 places, 174 transitions, 1951 flow. Second operand 19 states and 335 transitions. [2024-06-28 01:11:15,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 240 transitions, 3009 flow [2024-06-28 01:11:15,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 240 transitions, 2936 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-28 01:11:15,897 INFO L231 Difference]: Finished difference. Result has 295 places, 178 transitions, 2029 flow [2024-06-28 01:11:15,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2029, PETRI_PLACES=295, PETRI_TRANSITIONS=178} [2024-06-28 01:11:15,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 01:11:15,898 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 178 transitions, 2029 flow [2024-06-28 01:11:15,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:15,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:15,898 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] [2024-06-28 01:11:15,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 01:11:15,898 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:15,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1805343623, now seen corresponding path program 3 times [2024-06-28 01:11:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:15,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436921532] [2024-06-28 01:11:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:15,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:16,040 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 01:11:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436921532] [2024-06-28 01:11:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436921532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:16,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:16,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441552048] [2024-06-28 01:11:16,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:16,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:16,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:16,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 178 transitions, 2029 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:16,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:16,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:16,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:16,621 INFO L124 PetriNetUnfolderBase]: 1060/2354 cut-off events. [2024-06-28 01:11:16,621 INFO L125 PetriNetUnfolderBase]: For 88062/88065 co-relation queries the response was YES. [2024-06-28 01:11:16,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12171 conditions, 2354 events. 1060/2354 cut-off events. For 88062/88065 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16355 event pairs, 470 based on Foata normal form. 4/2347 useless extension candidates. Maximal degree in co-relation 11632. Up to 1577 conditions per place. [2024-06-28 01:11:16,646 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 179 selfloop transitions, 45 changer transitions 0/234 dead transitions. [2024-06-28 01:11:16,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 234 transitions, 2955 flow [2024-06-28 01:11:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 300 transitions. [2024-06-28 01:11:16,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45248868778280543 [2024-06-28 01:11:16,648 INFO L175 Difference]: Start difference. First operand has 295 places, 178 transitions, 2029 flow. Second operand 17 states and 300 transitions. [2024-06-28 01:11:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 234 transitions, 2955 flow [2024-06-28 01:11:16,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 234 transitions, 2842 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-06-28 01:11:16,882 INFO L231 Difference]: Finished difference. Result has 301 places, 181 transitions, 2070 flow [2024-06-28 01:11:16,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2070, PETRI_PLACES=301, PETRI_TRANSITIONS=181} [2024-06-28 01:11:16,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-28 01:11:16,883 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 181 transitions, 2070 flow [2024-06-28 01:11:16,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:16,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:16,883 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] [2024-06-28 01:11:16,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 01:11:16,884 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:16,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 316962521, now seen corresponding path program 4 times [2024-06-28 01:11:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:16,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686450780] [2024-06-28 01:11:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:17,051 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 01:11:17,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:17,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686450780] [2024-06-28 01:11:17,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686450780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:17,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:17,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:17,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923528997] [2024-06-28 01:11:17,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:17,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:17,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:17,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:17,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 181 transitions, 2070 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:17,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:17,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:17,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:17,584 INFO L124 PetriNetUnfolderBase]: 1054/2344 cut-off events. [2024-06-28 01:11:17,585 INFO L125 PetriNetUnfolderBase]: For 87770/87773 co-relation queries the response was YES. [2024-06-28 01:11:17,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12043 conditions, 2344 events. 1054/2344 cut-off events. For 87770/87773 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16302 event pairs, 467 based on Foata normal form. 4/2337 useless extension candidates. Maximal degree in co-relation 11495. Up to 1577 conditions per place. [2024-06-28 01:11:17,604 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 184 selfloop transitions, 45 changer transitions 0/239 dead transitions. [2024-06-28 01:11:17,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 239 transitions, 2892 flow [2024-06-28 01:11:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:11:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:11:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 330 transitions. [2024-06-28 01:11:17,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44534412955465585 [2024-06-28 01:11:17,605 INFO L175 Difference]: Start difference. First operand has 301 places, 181 transitions, 2070 flow. Second operand 19 states and 330 transitions. [2024-06-28 01:11:17,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 239 transitions, 2892 flow [2024-06-28 01:11:17,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 239 transitions, 2787 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-28 01:11:17,885 INFO L231 Difference]: Finished difference. Result has 307 places, 181 transitions, 2059 flow [2024-06-28 01:11:17,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2059, PETRI_PLACES=307, PETRI_TRANSITIONS=181} [2024-06-28 01:11:17,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-28 01:11:17,886 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 181 transitions, 2059 flow [2024-06-28 01:11:17,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:17,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:17,886 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] [2024-06-28 01:11:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 01:11:17,887 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash 203364889, now seen corresponding path program 5 times [2024-06-28 01:11:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015830827] [2024-06-28 01:11:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:18,021 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 01:11:18,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:18,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015830827] [2024-06-28 01:11:18,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015830827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:18,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:18,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 01:11:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690009748] [2024-06-28 01:11:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:18,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:11:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:11:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:11:18,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:18,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 181 transitions, 2059 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:11:18,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:18,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:18,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:18,461 INFO L124 PetriNetUnfolderBase]: 1048/2328 cut-off events. [2024-06-28 01:11:18,461 INFO L125 PetriNetUnfolderBase]: For 87070/87073 co-relation queries the response was YES. [2024-06-28 01:11:18,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11849 conditions, 2328 events. 1048/2328 cut-off events. For 87070/87073 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16160 event pairs, 352 based on Foata normal form. 4/2321 useless extension candidates. Maximal degree in co-relation 11300. Up to 1082 conditions per place. [2024-06-28 01:11:18,480 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 163 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-28 01:11:18,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 228 transitions, 2935 flow [2024-06-28 01:11:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:11:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:11:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-28 01:11:18,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893162393162393 [2024-06-28 01:11:18,482 INFO L175 Difference]: Start difference. First operand has 307 places, 181 transitions, 2059 flow. Second operand 12 states and 229 transitions. [2024-06-28 01:11:18,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 228 transitions, 2935 flow [2024-06-28 01:11:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 228 transitions, 2846 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-28 01:11:18,751 INFO L231 Difference]: Finished difference. Result has 306 places, 182 transitions, 2118 flow [2024-06-28 01:11:18,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2118, PETRI_PLACES=306, PETRI_TRANSITIONS=182} [2024-06-28 01:11:18,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 01:11:18,752 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 182 transitions, 2118 flow [2024-06-28 01:11:18,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 01:11:18,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:18,752 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] [2024-06-28 01:11:18,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 01:11:18,753 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:18,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1146086887, now seen corresponding path program 6 times [2024-06-28 01:11:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365417911] [2024-06-28 01:11:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:18,906 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 01:11:18,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:18,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365417911] [2024-06-28 01:11:18,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365417911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:18,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824132974] [2024-06-28 01:11:18,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:18,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:18,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:18,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:18,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 182 transitions, 2118 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:18,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:18,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:18,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:19,449 INFO L124 PetriNetUnfolderBase]: 1065/2375 cut-off events. [2024-06-28 01:11:19,449 INFO L125 PetriNetUnfolderBase]: For 95787/95790 co-relation queries the response was YES. [2024-06-28 01:11:19,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12344 conditions, 2375 events. 1065/2375 cut-off events. For 95787/95790 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16580 event pairs, 425 based on Foata normal form. 4/2368 useless extension candidates. Maximal degree in co-relation 11547. Up to 1437 conditions per place. [2024-06-28 01:11:19,465 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 173 selfloop transitions, 56 changer transitions 0/239 dead transitions. [2024-06-28 01:11:19,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 239 transitions, 3148 flow [2024-06-28 01:11:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 301 transitions. [2024-06-28 01:11:19,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539969834087481 [2024-06-28 01:11:19,475 INFO L175 Difference]: Start difference. First operand has 306 places, 182 transitions, 2118 flow. Second operand 17 states and 301 transitions. [2024-06-28 01:11:19,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 239 transitions, 3148 flow [2024-06-28 01:11:19,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 239 transitions, 3025 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-28 01:11:19,762 INFO L231 Difference]: Finished difference. Result has 315 places, 184 transitions, 2152 flow [2024-06-28 01:11:19,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2152, PETRI_PLACES=315, PETRI_TRANSITIONS=184} [2024-06-28 01:11:19,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-28 01:11:19,766 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 184 transitions, 2152 flow [2024-06-28 01:11:19,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:19,766 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] [2024-06-28 01:11:19,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 01:11:19,767 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:19,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1596328833, now seen corresponding path program 7 times [2024-06-28 01:11:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701223648] [2024-06-28 01:11:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:19,957 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 01:11:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701223648] [2024-06-28 01:11:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701223648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:19,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:19,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976905708] [2024-06-28 01:11:19,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:20,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:20,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 184 transitions, 2152 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:20,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:20,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:20,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:20,469 INFO L124 PetriNetUnfolderBase]: 1089/2430 cut-off events. [2024-06-28 01:11:20,470 INFO L125 PetriNetUnfolderBase]: For 106194/106197 co-relation queries the response was YES. [2024-06-28 01:11:20,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12904 conditions, 2430 events. 1089/2430 cut-off events. For 106194/106197 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17050 event pairs, 430 based on Foata normal form. 4/2423 useless extension candidates. Maximal degree in co-relation 12085. Up to 1524 conditions per place. [2024-06-28 01:11:20,490 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 163 selfloop transitions, 61 changer transitions 0/234 dead transitions. [2024-06-28 01:11:20,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 234 transitions, 3071 flow [2024-06-28 01:11:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:11:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:11:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 280 transitions. [2024-06-28 01:11:20,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-28 01:11:20,492 INFO L175 Difference]: Start difference. First operand has 315 places, 184 transitions, 2152 flow. Second operand 16 states and 280 transitions. [2024-06-28 01:11:20,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 234 transitions, 3071 flow [2024-06-28 01:11:20,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 234 transitions, 2881 flow, removed 18 selfloop flow, removed 17 redundant places. [2024-06-28 01:11:20,822 INFO L231 Difference]: Finished difference. Result has 314 places, 187 transitions, 2131 flow [2024-06-28 01:11:20,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2131, PETRI_PLACES=314, PETRI_TRANSITIONS=187} [2024-06-28 01:11:20,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 01:11:20,823 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 187 transitions, 2131 flow [2024-06-28 01:11:20,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:20,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:20,824 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] [2024-06-28 01:11:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 01:11:20,824 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:20,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 496708601, now seen corresponding path program 8 times [2024-06-28 01:11:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680224399] [2024-06-28 01:11:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:21,001 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 01:11:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:21,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680224399] [2024-06-28 01:11:21,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680224399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:21,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332442884] [2024-06-28 01:11:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:21,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:21,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:21,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 187 transitions, 2131 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:21,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:21,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:21,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:21,635 INFO L124 PetriNetUnfolderBase]: 1106/2472 cut-off events. [2024-06-28 01:11:21,636 INFO L125 PetriNetUnfolderBase]: For 114410/114413 co-relation queries the response was YES. [2024-06-28 01:11:21,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 2472 events. 1106/2472 cut-off events. For 114410/114413 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17431 event pairs, 430 based on Foata normal form. 4/2465 useless extension candidates. Maximal degree in co-relation 12609. Up to 1437 conditions per place. [2024-06-28 01:11:21,657 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 186 selfloop transitions, 59 changer transitions 0/255 dead transitions. [2024-06-28 01:11:21,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 255 transitions, 3233 flow [2024-06-28 01:11:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-28 01:11:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-28 01:11:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 364 transitions. [2024-06-28 01:11:21,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 01:11:21,659 INFO L175 Difference]: Start difference. First operand has 314 places, 187 transitions, 2131 flow. Second operand 21 states and 364 transitions. [2024-06-28 01:11:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 255 transitions, 3233 flow [2024-06-28 01:11:21,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 255 transitions, 3133 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-28 01:11:21,943 INFO L231 Difference]: Finished difference. Result has 324 places, 189 transitions, 2181 flow [2024-06-28 01:11:21,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2181, PETRI_PLACES=324, PETRI_TRANSITIONS=189} [2024-06-28 01:11:21,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-28 01:11:21,944 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 189 transitions, 2181 flow [2024-06-28 01:11:21,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:21,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:21,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:21,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 01:11:21,945 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:21,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 576332319, now seen corresponding path program 9 times [2024-06-28 01:11:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:21,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498700424] [2024-06-28 01:11:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:21,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:22,119 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 01:11:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498700424] [2024-06-28 01:11:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498700424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:22,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3025052] [2024-06-28 01:11:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:22,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:22,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 189 transitions, 2181 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:22,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:22,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:22,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:22,700 INFO L124 PetriNetUnfolderBase]: 1107/2475 cut-off events. [2024-06-28 01:11:22,701 INFO L125 PetriNetUnfolderBase]: For 116299/116302 co-relation queries the response was YES. [2024-06-28 01:11:22,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13205 conditions, 2475 events. 1107/2475 cut-off events. For 116299/116302 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17493 event pairs, 438 based on Foata normal form. 4/2468 useless extension candidates. Maximal degree in co-relation 12670. Up to 1567 conditions per place. [2024-06-28 01:11:22,722 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 164 selfloop transitions, 62 changer transitions 0/236 dead transitions. [2024-06-28 01:11:22,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 236 transitions, 2989 flow [2024-06-28 01:11:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:11:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:11:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 279 transitions. [2024-06-28 01:11:22,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2024-06-28 01:11:22,724 INFO L175 Difference]: Start difference. First operand has 324 places, 189 transitions, 2181 flow. Second operand 16 states and 279 transitions. [2024-06-28 01:11:22,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 236 transitions, 2989 flow [2024-06-28 01:11:23,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 236 transitions, 2835 flow, removed 7 selfloop flow, removed 19 redundant places. [2024-06-28 01:11:23,068 INFO L231 Difference]: Finished difference. Result has 321 places, 190 transitions, 2171 flow [2024-06-28 01:11:23,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2171, PETRI_PLACES=321, PETRI_TRANSITIONS=190} [2024-06-28 01:11:23,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-28 01:11:23,069 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 190 transitions, 2171 flow [2024-06-28 01:11:23,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:23,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:23,069 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] [2024-06-28 01:11:23,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 01:11:23,069 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:23,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:23,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2082293573, now seen corresponding path program 10 times [2024-06-28 01:11:23,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:23,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775996980] [2024-06-28 01:11:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:23,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:23,234 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 01:11:23,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:23,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775996980] [2024-06-28 01:11:23,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775996980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:23,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:23,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:23,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705434468] [2024-06-28 01:11:23,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:23,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:23,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:23,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:23,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:23,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:23,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 190 transitions, 2171 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:23,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:23,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:23,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:23,773 INFO L124 PetriNetUnfolderBase]: 1110/2491 cut-off events. [2024-06-28 01:11:23,773 INFO L125 PetriNetUnfolderBase]: For 120549/120552 co-relation queries the response was YES. [2024-06-28 01:11:23,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13248 conditions, 2491 events. 1110/2491 cut-off events. For 120549/120552 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17623 event pairs, 438 based on Foata normal form. 4/2484 useless extension candidates. Maximal degree in co-relation 12715. Up to 1437 conditions per place. [2024-06-28 01:11:23,795 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 179 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-06-28 01:11:23,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 248 transitions, 3025 flow [2024-06-28 01:11:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:11:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:11:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 331 transitions. [2024-06-28 01:11:23,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446693657219973 [2024-06-28 01:11:23,797 INFO L175 Difference]: Start difference. First operand has 321 places, 190 transitions, 2171 flow. Second operand 19 states and 331 transitions. [2024-06-28 01:11:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 248 transitions, 3025 flow [2024-06-28 01:11:24,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 248 transitions, 2885 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-28 01:11:24,166 INFO L231 Difference]: Finished difference. Result has 326 places, 190 transitions, 2153 flow [2024-06-28 01:11:24,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2153, PETRI_PLACES=326, PETRI_TRANSITIONS=190} [2024-06-28 01:11:24,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 01:11:24,169 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 190 transitions, 2153 flow [2024-06-28 01:11:24,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 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 01:11:24,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:24,170 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] [2024-06-28 01:11:24,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 01:11:24,170 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:24,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash -96564878, now seen corresponding path program 1 times [2024-06-28 01:11:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:24,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686753420] [2024-06-28 01:11:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:24,287 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 01:11:24,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:24,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686753420] [2024-06-28 01:11:24,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686753420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:24,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:24,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:11:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175368470] [2024-06-28 01:11:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:24,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:11:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:11:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:11:24,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:24,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 190 transitions, 2153 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:24,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:24,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:24,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:24,798 INFO L124 PetriNetUnfolderBase]: 1085/2431 cut-off events. [2024-06-28 01:11:24,799 INFO L125 PetriNetUnfolderBase]: For 114641/114644 co-relation queries the response was YES. [2024-06-28 01:11:24,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 2431 events. 1085/2431 cut-off events. For 114641/114644 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17127 event pairs, 416 based on Foata normal form. 16/2436 useless extension candidates. Maximal degree in co-relation 11603. Up to 1602 conditions per place. [2024-06-28 01:11:24,812 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 172 selfloop transitions, 50 changer transitions 0/232 dead transitions. [2024-06-28 01:11:24,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 232 transitions, 2732 flow [2024-06-28 01:11:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 01:11:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 01:11:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-28 01:11:24,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46548323471400394 [2024-06-28 01:11:24,813 INFO L175 Difference]: Start difference. First operand has 326 places, 190 transitions, 2153 flow. Second operand 13 states and 236 transitions. [2024-06-28 01:11:24,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 232 transitions, 2732 flow [2024-06-28 01:11:25,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 232 transitions, 2588 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-06-28 01:11:25,066 INFO L231 Difference]: Finished difference. Result has 322 places, 190 transitions, 2115 flow [2024-06-28 01:11:25,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2115, PETRI_PLACES=322, PETRI_TRANSITIONS=190} [2024-06-28 01:11:25,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-28 01:11:25,066 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 190 transitions, 2115 flow [2024-06-28 01:11:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:25,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:25,074 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] [2024-06-28 01:11:25,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 01:11:25,075 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:25,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1513311954, now seen corresponding path program 2 times [2024-06-28 01:11:25,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:25,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135063848] [2024-06-28 01:11:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:25,229 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 01:11:25,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:25,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135063848] [2024-06-28 01:11:25,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135063848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:25,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:25,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340486987] [2024-06-28 01:11:25,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:25,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:25,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:25,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:25,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 190 transitions, 2115 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:25,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:25,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:25,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:25,681 INFO L124 PetriNetUnfolderBase]: 1081/2426 cut-off events. [2024-06-28 01:11:25,682 INFO L125 PetriNetUnfolderBase]: For 96400/96403 co-relation queries the response was YES. [2024-06-28 01:11:25,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11953 conditions, 2426 events. 1081/2426 cut-off events. For 96400/96403 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17075 event pairs, 318 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 11419. Up to 818 conditions per place. [2024-06-28 01:11:25,700 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 170 selfloop transitions, 58 changer transitions 0/238 dead transitions. [2024-06-28 01:11:25,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 238 transitions, 2822 flow [2024-06-28 01:11:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 01:11:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 01:11:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2024-06-28 01:11:25,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47731755424063116 [2024-06-28 01:11:25,701 INFO L175 Difference]: Start difference. First operand has 322 places, 190 transitions, 2115 flow. Second operand 13 states and 242 transitions. [2024-06-28 01:11:25,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 238 transitions, 2822 flow [2024-06-28 01:11:25,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 238 transitions, 2744 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 01:11:25,983 INFO L231 Difference]: Finished difference. Result has 326 places, 190 transitions, 2156 flow [2024-06-28 01:11:25,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2156, PETRI_PLACES=326, PETRI_TRANSITIONS=190} [2024-06-28 01:11:25,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 01:11:25,984 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 190 transitions, 2156 flow [2024-06-28 01:11:25,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:25,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:25,984 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] [2024-06-28 01:11:25,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 01:11:25,984 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:25,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -709633778, now seen corresponding path program 3 times [2024-06-28 01:11:25,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:25,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52634003] [2024-06-28 01:11:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:25,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:26,163 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 01:11:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52634003] [2024-06-28 01:11:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52634003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:11:26,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225902537] [2024-06-28 01:11:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:11:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:11:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:11:26,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:26,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 190 transitions, 2156 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:26,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:26,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:26,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:26,787 INFO L124 PetriNetUnfolderBase]: 1069/2400 cut-off events. [2024-06-28 01:11:26,788 INFO L125 PetriNetUnfolderBase]: For 94097/94100 co-relation queries the response was YES. [2024-06-28 01:11:26,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11403 conditions, 2400 events. 1069/2400 cut-off events. For 94097/94100 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16894 event pairs, 351 based on Foata normal form. 12/2399 useless extension candidates. Maximal degree in co-relation 10562. Up to 1044 conditions per place. [2024-06-28 01:11:26,807 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 175 selfloop transitions, 66 changer transitions 0/251 dead transitions. [2024-06-28 01:11:26,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 251 transitions, 2941 flow [2024-06-28 01:11:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:11:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:11:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 295 transitions. [2024-06-28 01:11:26,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47275641025641024 [2024-06-28 01:11:26,815 INFO L175 Difference]: Start difference. First operand has 326 places, 190 transitions, 2156 flow. Second operand 16 states and 295 transitions. [2024-06-28 01:11:26,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 251 transitions, 2941 flow [2024-06-28 01:11:27,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 251 transitions, 2784 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-28 01:11:27,036 INFO L231 Difference]: Finished difference. Result has 330 places, 190 transitions, 2136 flow [2024-06-28 01:11:27,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2136, PETRI_PLACES=330, PETRI_TRANSITIONS=190} [2024-06-28 01:11:27,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 01:11:27,038 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 190 transitions, 2136 flow [2024-06-28 01:11:27,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:27,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:27,038 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] [2024-06-28 01:11:27,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 01:11:27,038 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:27,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:27,039 INFO L85 PathProgramCache]: Analyzing trace with hash -313760824, now seen corresponding path program 4 times [2024-06-28 01:11:27,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:27,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756567193] [2024-06-28 01:11:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:27,206 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 01:11:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756567193] [2024-06-28 01:11:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756567193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:11:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928479010] [2024-06-28 01:11:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:11:27,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:11:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:11:27,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:27,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 190 transitions, 2136 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:27,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:27,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:27,825 INFO L124 PetriNetUnfolderBase]: 1061/2387 cut-off events. [2024-06-28 01:11:27,826 INFO L125 PetriNetUnfolderBase]: For 79225/79228 co-relation queries the response was YES. [2024-06-28 01:11:27,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10914 conditions, 2387 events. 1061/2387 cut-off events. For 79225/79228 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16805 event pairs, 344 based on Foata normal form. 8/2382 useless extension candidates. Maximal degree in co-relation 10070. Up to 1140 conditions per place. [2024-06-28 01:11:27,844 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 160 selfloop transitions, 74 changer transitions 0/244 dead transitions. [2024-06-28 01:11:27,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 244 transitions, 2779 flow [2024-06-28 01:11:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:11:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:11:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 272 transitions. [2024-06-28 01:11:27,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46495726495726497 [2024-06-28 01:11:27,845 INFO L175 Difference]: Start difference. First operand has 330 places, 190 transitions, 2136 flow. Second operand 15 states and 272 transitions. [2024-06-28 01:11:27,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 244 transitions, 2779 flow [2024-06-28 01:11:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 244 transitions, 2640 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 01:11:28,056 INFO L231 Difference]: Finished difference. Result has 333 places, 190 transitions, 2149 flow [2024-06-28 01:11:28,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2149, PETRI_PLACES=333, PETRI_TRANSITIONS=190} [2024-06-28 01:11:28,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-28 01:11:28,057 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 190 transitions, 2149 flow [2024-06-28 01:11:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:28,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:28,057 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] [2024-06-28 01:11:28,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 01:11:28,058 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:28,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1351120682, now seen corresponding path program 5 times [2024-06-28 01:11:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828907710] [2024-06-28 01:11:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:28,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:28,206 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 01:11:28,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:28,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828907710] [2024-06-28 01:11:28,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828907710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:28,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:28,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:28,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286837848] [2024-06-28 01:11:28,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:28,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:28,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:28,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:28,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:28,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 190 transitions, 2149 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:28,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:28,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:28,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:28,722 INFO L124 PetriNetUnfolderBase]: 1057/2372 cut-off events. [2024-06-28 01:11:28,722 INFO L125 PetriNetUnfolderBase]: For 68999/69002 co-relation queries the response was YES. [2024-06-28 01:11:28,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10750 conditions, 2372 events. 1057/2372 cut-off events. For 68999/69002 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16646 event pairs, 368 based on Foata normal form. 4/2365 useless extension candidates. Maximal degree in co-relation 10205. Up to 1362 conditions per place. [2024-06-28 01:11:28,740 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 173 selfloop transitions, 47 changer transitions 0/230 dead transitions. [2024-06-28 01:11:28,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 230 transitions, 2721 flow [2024-06-28 01:11:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:11:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:11:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 01:11:28,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-28 01:11:28,753 INFO L175 Difference]: Start difference. First operand has 333 places, 190 transitions, 2149 flow. Second operand 10 states and 198 transitions. [2024-06-28 01:11:28,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 230 transitions, 2721 flow [2024-06-28 01:11:28,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 230 transitions, 2579 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 01:11:28,975 INFO L231 Difference]: Finished difference. Result has 331 places, 190 transitions, 2105 flow [2024-06-28 01:11:28,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2105, PETRI_PLACES=331, PETRI_TRANSITIONS=190} [2024-06-28 01:11:28,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 01:11:28,976 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 190 transitions, 2105 flow [2024-06-28 01:11:28,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:28,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:28,976 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] [2024-06-28 01:11:28,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 01:11:28,976 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:28,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1422413310, now seen corresponding path program 6 times [2024-06-28 01:11:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:28,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511594414] [2024-06-28 01:11:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:29,146 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 01:11:29,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:29,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511594414] [2024-06-28 01:11:29,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511594414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:29,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:29,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:11:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306548176] [2024-06-28 01:11:29,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:29,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:11:29,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:29,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:11:29,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:11:29,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:29,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 190 transitions, 2105 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:29,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:29,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:29,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:29,664 INFO L124 PetriNetUnfolderBase]: 1041/2346 cut-off events. [2024-06-28 01:11:29,664 INFO L125 PetriNetUnfolderBase]: For 64660/64663 co-relation queries the response was YES. [2024-06-28 01:11:29,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9722 conditions, 2346 events. 1041/2346 cut-off events. For 64660/64663 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16516 event pairs, 437 based on Foata normal form. 16/2351 useless extension candidates. Maximal degree in co-relation 9344. Up to 1608 conditions per place. [2024-06-28 01:11:29,682 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 172 selfloop transitions, 52 changer transitions 0/234 dead transitions. [2024-06-28 01:11:29,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 234 transitions, 2693 flow [2024-06-28 01:11:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 288 transitions. [2024-06-28 01:11:29,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343891402714932 [2024-06-28 01:11:29,683 INFO L175 Difference]: Start difference. First operand has 331 places, 190 transitions, 2105 flow. Second operand 17 states and 288 transitions. [2024-06-28 01:11:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 234 transitions, 2693 flow [2024-06-28 01:11:29,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 234 transitions, 2536 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 01:11:29,805 INFO L231 Difference]: Finished difference. Result has 339 places, 190 transitions, 2058 flow [2024-06-28 01:11:29,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2058, PETRI_PLACES=339, PETRI_TRANSITIONS=190} [2024-06-28 01:11:29,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 01:11:29,806 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 190 transitions, 2058 flow [2024-06-28 01:11:29,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:29,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:29,807 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] [2024-06-28 01:11:29,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 01:11:29,807 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:29,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash -202589382, now seen corresponding path program 7 times [2024-06-28 01:11:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:29,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439163897] [2024-06-28 01:11:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:29,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:29,989 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 01:11:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439163897] [2024-06-28 01:11:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439163897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:29,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:29,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:11:29,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689849720] [2024-06-28 01:11:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:29,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:11:29,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:11:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:11:30,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:30,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 190 transitions, 2058 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:30,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:30,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:30,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:30,544 INFO L124 PetriNetUnfolderBase]: 1029/2321 cut-off events. [2024-06-28 01:11:30,544 INFO L125 PetriNetUnfolderBase]: For 38544/38547 co-relation queries the response was YES. [2024-06-28 01:11:30,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8849 conditions, 2321 events. 1029/2321 cut-off events. For 38544/38547 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16364 event pairs, 367 based on Foata normal form. 12/2322 useless extension candidates. Maximal degree in co-relation 8452. Up to 1317 conditions per place. [2024-06-28 01:11:30,561 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 173 selfloop transitions, 64 changer transitions 0/247 dead transitions. [2024-06-28 01:11:30,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 247 transitions, 2812 flow [2024-06-28 01:11:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:11:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:11:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 339 transitions. [2024-06-28 01:11:30,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-06-28 01:11:30,562 INFO L175 Difference]: Start difference. First operand has 339 places, 190 transitions, 2058 flow. Second operand 20 states and 339 transitions. [2024-06-28 01:11:30,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 247 transitions, 2812 flow [2024-06-28 01:11:30,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 247 transitions, 2728 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-28 01:11:30,646 INFO L231 Difference]: Finished difference. Result has 346 places, 190 transitions, 2107 flow [2024-06-28 01:11:30,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2107, PETRI_PLACES=346, PETRI_TRANSITIONS=190} [2024-06-28 01:11:30,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-28 01:11:30,646 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 190 transitions, 2107 flow [2024-06-28 01:11:30,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:30,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:30,647 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] [2024-06-28 01:11:30,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 01:11:30,647 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:30,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2134801736, now seen corresponding path program 8 times [2024-06-28 01:11:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210376562] [2024-06-28 01:11:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:30,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:30,809 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 01:11:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210376562] [2024-06-28 01:11:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210376562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:30,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:30,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:11:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463907275] [2024-06-28 01:11:30,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:30,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:11:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:11:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:11:30,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:30,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 190 transitions, 2107 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:30,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:30,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:30,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:31,240 INFO L124 PetriNetUnfolderBase]: 1025/2308 cut-off events. [2024-06-28 01:11:31,240 INFO L125 PetriNetUnfolderBase]: For 19533/19536 co-relation queries the response was YES. [2024-06-28 01:11:31,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8681 conditions, 2308 events. 1025/2308 cut-off events. For 19533/19536 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16225 event pairs, 307 based on Foata normal form. 4/2301 useless extension candidates. Maximal degree in co-relation 8275. Up to 994 conditions per place. [2024-06-28 01:11:31,257 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 167 selfloop transitions, 60 changer transitions 0/237 dead transitions. [2024-06-28 01:11:31,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 237 transitions, 2709 flow [2024-06-28 01:11:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 01:11:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 01:11:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 252 transitions. [2024-06-28 01:11:31,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-28 01:11:31,258 INFO L175 Difference]: Start difference. First operand has 346 places, 190 transitions, 2107 flow. Second operand 14 states and 252 transitions. [2024-06-28 01:11:31,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 237 transitions, 2709 flow [2024-06-28 01:11:31,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 237 transitions, 2598 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-06-28 01:11:31,319 INFO L231 Difference]: Finished difference. Result has 345 places, 190 transitions, 2119 flow [2024-06-28 01:11:31,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2119, PETRI_PLACES=345, PETRI_TRANSITIONS=190} [2024-06-28 01:11:31,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 01:11:31,320 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 190 transitions, 2119 flow [2024-06-28 01:11:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:31,320 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] [2024-06-28 01:11:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 01:11:31,320 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:31,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -768648290, now seen corresponding path program 9 times [2024-06-28 01:11:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:31,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251828599] [2024-06-28 01:11:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:31,528 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 01:11:31,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:31,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251828599] [2024-06-28 01:11:31,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251828599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:31,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:31,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:11:31,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681739559] [2024-06-28 01:11:31,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:11:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:11:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:11:31,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-28 01:11:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 190 transitions, 2119 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-28 01:11:31,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:32,148 INFO L124 PetriNetUnfolderBase]: 1021/2305 cut-off events. [2024-06-28 01:11:32,149 INFO L125 PetriNetUnfolderBase]: For 13216/13219 co-relation queries the response was YES. [2024-06-28 01:11:32,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8487 conditions, 2305 events. 1021/2305 cut-off events. For 13216/13219 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16260 event pairs, 369 based on Foata normal form. 4/2298 useless extension candidates. Maximal degree in co-relation 8347. Up to 1396 conditions per place. [2024-06-28 01:11:32,169 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 158 selfloop transitions, 65 changer transitions 0/233 dead transitions. [2024-06-28 01:11:32,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 233 transitions, 2577 flow [2024-06-28 01:11:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:11:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:11:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 285 transitions. [2024-06-28 01:11:32,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298642533936652 [2024-06-28 01:11:32,170 INFO L175 Difference]: Start difference. First operand has 345 places, 190 transitions, 2119 flow. Second operand 17 states and 285 transitions. [2024-06-28 01:11:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 233 transitions, 2577 flow [2024-06-28 01:11:32,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 233 transitions, 2136 flow, removed 4 selfloop flow, removed 76 redundant places. [2024-06-28 01:11:32,195 INFO L231 Difference]: Finished difference. Result has 284 places, 189 transitions, 1688 flow [2024-06-28 01:11:32,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1688, PETRI_PLACES=284, PETRI_TRANSITIONS=189} [2024-06-28 01:11:32,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 01:11:32,195 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 189 transitions, 1688 flow [2024-06-28 01:11:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:32,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:32,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:32,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 01:11:32,198 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:32,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1548798941, now seen corresponding path program 1 times [2024-06-28 01:11:32,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:32,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815653259] [2024-06-28 01:11:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:32,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:32,362 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 01:11:32,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815653259] [2024-06-28 01:11:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815653259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:32,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:32,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:11:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452194058] [2024-06-28 01:11:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:11:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:11:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:11:32,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-06-28 01:11:32,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 189 transitions, 1688 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:32,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:32,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-06-28 01:11:32,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:32,604 INFO L124 PetriNetUnfolderBase]: 797/2067 cut-off events. [2024-06-28 01:11:32,604 INFO L125 PetriNetUnfolderBase]: For 3357/3381 co-relation queries the response was YES. [2024-06-28 01:11:32,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6884 conditions, 2067 events. 797/2067 cut-off events. For 3357/3381 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15930 event pairs, 242 based on Foata normal form. 12/2034 useless extension candidates. Maximal degree in co-relation 6498. Up to 431 conditions per place. [2024-06-28 01:11:32,612 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 32 selfloop transitions, 17 changer transitions 114/210 dead transitions. [2024-06-28 01:11:32,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 210 transitions, 1973 flow [2024-06-28 01:11:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:11:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:11:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 01:11:32,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-06-28 01:11:32,613 INFO L175 Difference]: Start difference. First operand has 284 places, 189 transitions, 1688 flow. Second operand 7 states and 178 transitions. [2024-06-28 01:11:32,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 210 transitions, 1973 flow [2024-06-28 01:11:32,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 210 transitions, 1818 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-28 01:11:32,624 INFO L231 Difference]: Finished difference. Result has 277 places, 92 transitions, 608 flow [2024-06-28 01:11:32,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=277, PETRI_TRANSITIONS=92} [2024-06-28 01:11:32,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 01:11:32,624 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 92 transitions, 608 flow [2024-06-28 01:11:32,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:32,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:11:32,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:32,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 01:11:32,625 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:11:32,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:11:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1461223033, now seen corresponding path program 2 times [2024-06-28 01:11:32,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:11:32,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528086806] [2024-06-28 01:11:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:11:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:11:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:11:32,721 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 01:11:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:11:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528086806] [2024-06-28 01:11:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528086806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:11:32,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:11:32,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:11:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762510585] [2024-06-28 01:11:32,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:11:32,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:11:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:11:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:11:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:11:32,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-06-28 01:11:32,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 92 transitions, 608 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:32,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:11:32,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-06-28 01:11:32,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:11:32,845 INFO L124 PetriNetUnfolderBase]: 286/777 cut-off events. [2024-06-28 01:11:32,845 INFO L125 PetriNetUnfolderBase]: For 865/880 co-relation queries the response was YES. [2024-06-28 01:11:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 777 events. 286/777 cut-off events. For 865/880 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4888 event pairs, 68 based on Foata normal form. 9/767 useless extension candidates. Maximal degree in co-relation 2347. Up to 251 conditions per place. [2024-06-28 01:11:32,848 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2024-06-28 01:11:32,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 96 transitions, 716 flow [2024-06-28 01:11:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:11:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:11:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 01:11:32,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-28 01:11:32,849 INFO L175 Difference]: Start difference. First operand has 277 places, 92 transitions, 608 flow. Second operand 6 states and 139 transitions. [2024-06-28 01:11:32,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 96 transitions, 716 flow [2024-06-28 01:11:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 96 transitions, 558 flow, removed 6 selfloop flow, removed 32 redundant places. [2024-06-28 01:11:32,853 INFO L231 Difference]: Finished difference. Result has 134 places, 0 transitions, 0 flow [2024-06-28 01:11:32,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=134, PETRI_TRANSITIONS=0} [2024-06-28 01:11:32,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-28 01:11:32,855 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 0 transitions, 0 flow [2024-06-28 01:11:32,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:11:32,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-28 01:11:32,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-28 01:11:32,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-28 01:11:32,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-28 01:11:32,860 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-28 01:11:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 01:11:32,860 INFO L445 BasicCegarLoop]: Path program histogram: [11, 10, 10, 9, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:11:32,862 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 01:11:32,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 01:11:32,866 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-28 01:11:32,866 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-28 01:11:32,867 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 01:11:32 BasicIcfg [2024-06-28 01:11:32,867 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 01:11:32,867 INFO L158 Benchmark]: Toolchain (without parser) took 46359.06ms. Allocated memory was 176.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 103.8MB in the beginning and 595.1MB in the end (delta: -491.4MB). Peak memory consumption was 569.3MB. Max. memory is 16.1GB. [2024-06-28 01:11:32,867 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 176.2MB. Free memory was 143.8MB in the beginning and 143.8MB in the end (delta: 16.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 01:11:32,868 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 108.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 01:11:32,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.80ms. Allocated memory is still 176.2MB. Free memory was 103.8MB in the beginning and 135.6MB in the end (delta: -31.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-06-28 01:11:32,868 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.92ms. Allocated memory is still 176.2MB. Free memory was 135.6MB in the beginning and 133.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 01:11:32,868 INFO L158 Benchmark]: Boogie Preprocessor took 35.37ms. Allocated memory is still 176.2MB. Free memory was 133.5MB in the beginning and 131.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 01:11:32,869 INFO L158 Benchmark]: RCFGBuilder took 422.55ms. Allocated memory is still 176.2MB. Free memory was 131.4MB in the beginning and 107.3MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-06-28 01:11:32,869 INFO L158 Benchmark]: TraceAbstraction took 45538.49ms. Allocated memory was 176.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 106.2MB in the beginning and 595.1MB in the end (delta: -488.9MB). Peak memory consumption was 574.3MB. Max. memory is 16.1GB. [2024-06-28 01:11:32,871 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 176.2MB. Free memory was 143.8MB in the beginning and 143.8MB in the end (delta: 16.8kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 108.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.80ms. Allocated memory is still 176.2MB. Free memory was 103.8MB in the beginning and 135.6MB in the end (delta: -31.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.92ms. Allocated memory is still 176.2MB. Free memory was 135.6MB in the beginning and 133.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.37ms. Allocated memory is still 176.2MB. Free memory was 133.5MB in the beginning and 131.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 422.55ms. Allocated memory is still 176.2MB. Free memory was 131.4MB in the beginning and 107.3MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 45538.49ms. Allocated memory was 176.2MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 106.2MB in the beginning and 595.1MB in the end (delta: -488.9MB). Peak memory consumption was 574.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 111]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 112]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 116]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 66 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 45.4s, OverallIterations: 71, TraceHistogramMax: 1, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 34.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6465 SdHoareTripleChecker+Valid, 10.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5811 mSDsluCounter, 1588 SdHoareTripleChecker+Invalid, 8.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1061 mSDsCounter, 932 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21822 IncrementalHoareTripleChecker+Invalid, 22754 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 932 mSolverCounterUnsat, 527 mSDtfsCounter, 21822 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 924 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 914 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2103 ImplicationChecksByTransitivity, 7.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2181occurred in iteration=58, InterpolantAutomatonStates: 821, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 1620 NumberOfCodeBlocks, 1620 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1549 ConstructedInterpolants, 0 QuantifiedInterpolants, 17440 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 71 InterpolantComputations, 71 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 01:11:32,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE