./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:12:35,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:12:35,649 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:12:35,654 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:12:35,654 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:12:35,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:12:35,677 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:12:35,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:12:35,678 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:12:35,681 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:12:35,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:12:35,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:12:35,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:12:35,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:12:35,682 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:12:35,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:12:35,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:12:35,683 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:12:35,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:12:35,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:12:35,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:12:35,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:12:35,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:12:35,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:12:35,684 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:12:35,684 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:12:35,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:12:35,685 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:12:35,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:12:35,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:12:35,686 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:12:35,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:12:35,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:12:35,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:12:35,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:12:35,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:12:35,687 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:12:35,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:12:35,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:12:35,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:12:35,688 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:12:35,689 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:12:35,689 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:12:35,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:12:35,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:12:35,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:12:35,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:12:35,863 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:12:35,864 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:12:35,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 20:12:36,862 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:12:37,110 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:12:37,115 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 20:12:37,131 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cdd09c08/3b15bc4e823e4a7e85df9b1111a77ac3/FLAG8aeef751a [2024-06-21 20:12:37,146 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cdd09c08/3b15bc4e823e4a7e85df9b1111a77ac3 [2024-06-21 20:12:37,149 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:12:37,149 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:12:37,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 20:12:37,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:12:37,277 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:12:37,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:12:37,278 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:12:37,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:12:37,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:12:37" (1/2) ... [2024-06-21 20:12:37,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6b15ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:12:37, skipping insertion in model container [2024-06-21 20:12:37,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:12:37" (1/2) ... [2024-06-21 20:12:37,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64db6ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:12:37, skipping insertion in model container [2024-06-21 20:12:37,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:12:37" (2/2) ... [2024-06-21 20:12:37,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6b15ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37, skipping insertion in model container [2024-06-21 20:12:37,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:12:37" (2/2) ... [2024-06-21 20:12:37,285 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:12:37,328 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:12:37,329 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-21 20:12:37,329 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-21 20:12:37,329 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-21 20:12:37,329 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-21 20:12:37,329 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:12:37,330 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-21 20:12:37,366 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:12:37,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:12:37,679 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:12:37,795 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:12:37,824 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:12:37,825 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37 WrapperNode [2024-06-21 20:12:37,826 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:12:37,827 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:12:37,827 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:12:37,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:12:37,832 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 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,856 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 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,888 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-21 20:12:37,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:12:37,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:12:37,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:12:37,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:12:37,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,904 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,929 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]. [2024-06-21 20:12:37,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:12:37,955 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:12:37,955 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:12:37,955 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:12:37,955 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (1/1) ... [2024-06-21 20:12:37,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:12:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:12:37,982 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) [2024-06-21 20:12:37,984 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 [2024-06-21 20:12:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:12:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:12:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:12:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:12:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:12:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:12:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:12:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:12:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:12:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:12:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:12:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:12:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:12:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:12:38,021 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:12:38,108 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:12:38,110 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:12:38,353 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:12:38,354 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:12:38,423 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:12:38,423 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:12:38,424 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:12:38 BoogieIcfgContainer [2024-06-21 20:12:38,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:12:38,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:12:38,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:12:38,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:12:38,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:12:37" (1/4) ... [2024-06-21 20:12:38,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b20b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:12:38, skipping insertion in model container [2024-06-21 20:12:38,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:12:37" (2/4) ... [2024-06-21 20:12:38,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b20b6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:12:38, skipping insertion in model container [2024-06-21 20:12:38,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:12:37" (3/4) ... [2024-06-21 20:12:38,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b20b6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:12:38, skipping insertion in model container [2024-06-21 20:12:38,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:12:38" (4/4) ... [2024-06-21 20:12:38,431 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 20:12:38,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:12:38,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:12:38,445 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:12:38,495 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:12:38,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-21 20:12:38,553 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-21 20:12:38,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:12:38,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:12:38,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-21 20:12:38,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-21 20:12:38,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:12:38,577 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;@2f91f47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:12:38,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:12:38,580 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:12:38,580 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:12:38,580 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:12:38,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:38,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:12:38,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:38,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash 225172065, now seen corresponding path program 1 times [2024-06-21 20:12:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:38,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103959353] [2024-06-21 20:12:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:38,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103959353] [2024-06-21 20:12:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103959353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:38,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:38,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:12:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763542072] [2024-06-21 20:12:38,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:38,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:12:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:12:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:12:38,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 20:12:38,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:38,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:38,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 20:12:38,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:39,341 INFO L124 PetriNetUnfolderBase]: 2723/4049 cut-off events. [2024-06-21 20:12:39,342 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-21 20:12:39,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8049 conditions, 4049 events. 2723/4049 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22395 event pairs, 1898 based on Foata normal form. 1/3918 useless extension candidates. Maximal degree in co-relation 8036. Up to 3813 conditions per place. [2024-06-21 20:12:39,370 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 37 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-21 20:12:39,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 211 flow [2024-06-21 20:12:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:12:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:12:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-21 20:12:39,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-06-21 20:12:39,381 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 103 transitions. [2024-06-21 20:12:39,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 211 flow [2024-06-21 20:12:39,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 204 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:12:39,388 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-21 20:12:39,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-21 20:12:39,392 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-21 20:12:39,392 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-21 20:12:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:39,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:39,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:39,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:12:39,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:39,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -623443094, now seen corresponding path program 1 times [2024-06-21 20:12:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769912958] [2024-06-21 20:12:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:39,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:39,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769912958] [2024-06-21 20:12:39,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769912958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:39,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:39,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:12:39,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159199938] [2024-06-21 20:12:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:39,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:12:39,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:12:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:12:39,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:39,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:39,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:39,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:39,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:40,073 INFO L124 PetriNetUnfolderBase]: 4385/6499 cut-off events. [2024-06-21 20:12:40,074 INFO L125 PetriNetUnfolderBase]: For 1123/1132 co-relation queries the response was YES. [2024-06-21 20:12:40,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 6499 events. 4385/6499 cut-off events. For 1123/1132 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36112 event pairs, 1932 based on Foata normal form. 11/6499 useless extension candidates. Maximal degree in co-relation 14753. Up to 5945 conditions per place. [2024-06-21 20:12:40,109 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 58 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-21 20:12:40,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 376 flow [2024-06-21 20:12:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:12:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:12:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-21 20:12:40,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989795918367347 [2024-06-21 20:12:40,111 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 137 transitions. [2024-06-21 20:12:40,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 376 flow [2024-06-21 20:12:40,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:12:40,116 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 222 flow [2024-06-21 20:12:40,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-21 20:12:40,117 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-21 20:12:40,117 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 222 flow [2024-06-21 20:12:40,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:40,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:40,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:40,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:12:40,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:40,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2128306583, now seen corresponding path program 1 times [2024-06-21 20:12:40,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:40,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058379179] [2024-06-21 20:12:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:40,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:40,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:40,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058379179] [2024-06-21 20:12:40,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058379179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:40,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:40,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832643939] [2024-06-21 20:12:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:40,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:40,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:40,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:40,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:40,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:40,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:40,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:40,738 INFO L124 PetriNetUnfolderBase]: 4527/6713 cut-off events. [2024-06-21 20:12:40,738 INFO L125 PetriNetUnfolderBase]: For 4346/4370 co-relation queries the response was YES. [2024-06-21 20:12:40,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18077 conditions, 6713 events. 4527/6713 cut-off events. For 4346/4370 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37507 event pairs, 1443 based on Foata normal form. 46/6748 useless extension candidates. Maximal degree in co-relation 18062. Up to 5937 conditions per place. [2024-06-21 20:12:40,837 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 68 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-21 20:12:40,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 506 flow [2024-06-21 20:12:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-21 20:12:40,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6816326530612244 [2024-06-21 20:12:40,840 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 222 flow. Second operand 5 states and 167 transitions. [2024-06-21 20:12:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 506 flow [2024-06-21 20:12:40,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 502 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:12:40,855 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 277 flow [2024-06-21 20:12:40,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-21 20:12:40,856 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-21 20:12:40,856 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 277 flow [2024-06-21 20:12:40,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:40,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:40,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:40,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:12:40,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:40,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1404815442, now seen corresponding path program 1 times [2024-06-21 20:12:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:40,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826907567] [2024-06-21 20:12:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:40,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:40,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826907567] [2024-06-21 20:12:40,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826907567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:40,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:40,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:12:40,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321229872] [2024-06-21 20:12:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:12:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:12:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:12:41,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:41,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:41,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:41,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:41,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:41,387 INFO L124 PetriNetUnfolderBase]: 3542/5228 cut-off events. [2024-06-21 20:12:41,387 INFO L125 PetriNetUnfolderBase]: For 5883/5883 co-relation queries the response was YES. [2024-06-21 20:12:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15769 conditions, 5228 events. 3542/5228 cut-off events. For 5883/5883 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29056 event pairs, 1668 based on Foata normal form. 6/5225 useless extension candidates. Maximal degree in co-relation 15751. Up to 4874 conditions per place. [2024-06-21 20:12:41,426 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 52 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-06-21 20:12:41,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 464 flow [2024-06-21 20:12:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:12:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:12:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-21 20:12:41,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-21 20:12:41,429 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 277 flow. Second operand 4 states and 131 transitions. [2024-06-21 20:12:41,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 464 flow [2024-06-21 20:12:41,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 429 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:41,435 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 306 flow [2024-06-21 20:12:41,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 20:12:41,436 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-21 20:12:41,436 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 306 flow [2024-06-21 20:12:41,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:41,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:41,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:41,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:12:41,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:41,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:41,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1006660495, now seen corresponding path program 1 times [2024-06-21 20:12:41,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:41,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960806629] [2024-06-21 20:12:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:41,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960806629] [2024-06-21 20:12:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960806629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:41,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:12:41,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192877138] [2024-06-21 20:12:41,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:12:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:12:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:12:41,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:41,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:41,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:41,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:41,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:41,942 INFO L124 PetriNetUnfolderBase]: 3655/5429 cut-off events. [2024-06-21 20:12:41,943 INFO L125 PetriNetUnfolderBase]: For 7448/7448 co-relation queries the response was YES. [2024-06-21 20:12:41,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16682 conditions, 5429 events. 3655/5429 cut-off events. For 7448/7448 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30247 event pairs, 1490 based on Foata normal form. 30/5450 useless extension candidates. Maximal degree in co-relation 16662. Up to 4863 conditions per place. [2024-06-21 20:12:41,978 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 63 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-21 20:12:41,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 560 flow [2024-06-21 20:12:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-21 20:12:41,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2024-06-21 20:12:41,982 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 306 flow. Second operand 5 states and 163 transitions. [2024-06-21 20:12:41,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 560 flow [2024-06-21 20:12:41,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 545 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 20:12:41,988 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 362 flow [2024-06-21 20:12:41,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-21 20:12:41,993 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-06-21 20:12:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 362 flow [2024-06-21 20:12:41,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:41,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:41,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:41,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:12:41,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:41,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash -957714512, now seen corresponding path program 1 times [2024-06-21 20:12:41,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:41,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907727513] [2024-06-21 20:12:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:41,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:42,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:42,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907727513] [2024-06-21 20:12:42,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907727513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:42,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:42,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:12:42,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919762264] [2024-06-21 20:12:42,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:42,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:12:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:12:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:12:42,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:42,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:42,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:42,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:42,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:42,509 INFO L124 PetriNetUnfolderBase]: 4565/6735 cut-off events. [2024-06-21 20:12:42,510 INFO L125 PetriNetUnfolderBase]: For 12227/12230 co-relation queries the response was YES. [2024-06-21 20:12:42,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21804 conditions, 6735 events. 4565/6735 cut-off events. For 12227/12230 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 37212 event pairs, 1849 based on Foata normal form. 5/6733 useless extension candidates. Maximal degree in co-relation 21782. Up to 6310 conditions per place. [2024-06-21 20:12:42,547 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-21 20:12:42,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 676 flow [2024-06-21 20:12:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:12:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:12:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-21 20:12:42,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:12:42,548 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 362 flow. Second operand 4 states and 126 transitions. [2024-06-21 20:12:42,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 676 flow [2024-06-21 20:12:42,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 631 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:42,561 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 450 flow [2024-06-21 20:12:42,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2024-06-21 20:12:42,563 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-21 20:12:42,564 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 450 flow [2024-06-21 20:12:42,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:42,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:42,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:12:42,564 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:42,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1112143450, now seen corresponding path program 1 times [2024-06-21 20:12:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84170214] [2024-06-21 20:12:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:42,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84170214] [2024-06-21 20:12:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84170214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:42,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:42,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108469424] [2024-06-21 20:12:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:42,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:42,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:42,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 450 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:42,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:42,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:42,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:43,095 INFO L124 PetriNetUnfolderBase]: 4606/6794 cut-off events. [2024-06-21 20:12:43,095 INFO L125 PetriNetUnfolderBase]: For 18135/18141 co-relation queries the response was YES. [2024-06-21 20:12:43,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24105 conditions, 6794 events. 4606/6794 cut-off events. For 18135/18141 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37884 event pairs, 1275 based on Foata normal form. 19/6800 useless extension candidates. Maximal degree in co-relation 24081. Up to 5615 conditions per place. [2024-06-21 20:12:43,136 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 83 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-21 20:12:43,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 811 flow [2024-06-21 20:12:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 20:12:43,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 20:12:43,138 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 450 flow. Second operand 5 states and 161 transitions. [2024-06-21 20:12:43,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 811 flow [2024-06-21 20:12:43,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 797 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-21 20:12:43,150 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 529 flow [2024-06-21 20:12:43,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-21 20:12:43,151 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2024-06-21 20:12:43,151 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 529 flow [2024-06-21 20:12:43,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:43,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:43,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:43,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:12:43,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:43,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1638247816, now seen corresponding path program 1 times [2024-06-21 20:12:43,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:43,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014808209] [2024-06-21 20:12:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:43,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014808209] [2024-06-21 20:12:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014808209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:43,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:43,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:43,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671434352] [2024-06-21 20:12:43,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:43,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:43,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:43,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:43,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 529 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:43,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:43,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:43,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:43,726 INFO L124 PetriNetUnfolderBase]: 4567/6763 cut-off events. [2024-06-21 20:12:43,726 INFO L125 PetriNetUnfolderBase]: For 22468/22474 co-relation queries the response was YES. [2024-06-21 20:12:43,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25083 conditions, 6763 events. 4567/6763 cut-off events. For 22468/22474 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37733 event pairs, 990 based on Foata normal form. 19/6769 useless extension candidates. Maximal degree in co-relation 25056. Up to 5597 conditions per place. [2024-06-21 20:12:43,773 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-21 20:12:43,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 802 flow [2024-06-21 20:12:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-21 20:12:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-21 20:12:43,775 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 529 flow. Second operand 5 states and 158 transitions. [2024-06-21 20:12:43,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 802 flow [2024-06-21 20:12:43,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 775 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 20:12:43,803 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 535 flow [2024-06-21 20:12:43,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-21 20:12:43,804 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-21 20:12:43,804 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 535 flow [2024-06-21 20:12:43,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:43,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:43,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:43,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:12:43,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:43,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1368154938, now seen corresponding path program 1 times [2024-06-21 20:12:43,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:43,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017067085] [2024-06-21 20:12:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:43,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017067085] [2024-06-21 20:12:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017067085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:43,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:43,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:12:43,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504372652] [2024-06-21 20:12:43,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:12:43,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:12:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:12:43,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:43,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2024-06-21 20:12:43,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:43,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:43,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:44,385 INFO L124 PetriNetUnfolderBase]: 4397/6624 cut-off events. [2024-06-21 20:12:44,385 INFO L125 PetriNetUnfolderBase]: For 25979/25988 co-relation queries the response was YES. [2024-06-21 20:12:44,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25249 conditions, 6624 events. 4397/6624 cut-off events. For 25979/25988 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 38108 event pairs, 1748 based on Foata normal form. 10/6621 useless extension candidates. Maximal degree in co-relation 25220. Up to 5898 conditions per place. [2024-06-21 20:12:44,419 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 73 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-21 20:12:44,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 983 flow [2024-06-21 20:12:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-21 20:12:44,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-21 20:12:44,421 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 535 flow. Second operand 5 states and 162 transitions. [2024-06-21 20:12:44,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 983 flow [2024-06-21 20:12:44,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 927 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:12:44,448 INFO L231 Difference]: Finished difference. Result has 77 places, 93 transitions, 698 flow [2024-06-21 20:12:44,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=698, PETRI_PLACES=77, PETRI_TRANSITIONS=93} [2024-06-21 20:12:44,448 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-21 20:12:44,449 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 93 transitions, 698 flow [2024-06-21 20:12:44,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2024-06-21 20:12:44,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:44,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:44,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:12:44,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:44,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1034294440, now seen corresponding path program 2 times [2024-06-21 20:12:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536297319] [2024-06-21 20:12:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536297319] [2024-06-21 20:12:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536297319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:12:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624906139] [2024-06-21 20:12:44,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:44,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:12:44,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:12:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:12:44,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:44,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 93 transitions, 698 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2024-06-21 20:12:44,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:44,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:44,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:44,963 INFO L124 PetriNetUnfolderBase]: 4452/6723 cut-off events. [2024-06-21 20:12:44,963 INFO L125 PetriNetUnfolderBase]: For 33232/33244 co-relation queries the response was YES. [2024-06-21 20:12:44,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 6723 events. 4452/6723 cut-off events. For 33232/33244 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38647 event pairs, 1730 based on Foata normal form. 12/6729 useless extension candidates. Maximal degree in co-relation 27896. Up to 6020 conditions per place. [2024-06-21 20:12:45,014 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 88 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-21 20:12:45,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 1135 flow [2024-06-21 20:12:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-21 20:12:45,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-21 20:12:45,015 INFO L175 Difference]: Start difference. First operand has 77 places, 93 transitions, 698 flow. Second operand 5 states and 165 transitions. [2024-06-21 20:12:45,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 1135 flow [2024-06-21 20:12:45,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 131 transitions, 1103 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 20:12:45,071 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 869 flow [2024-06-21 20:12:45,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=869, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2024-06-21 20:12:45,071 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2024-06-21 20:12:45,071 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 869 flow [2024-06-21 20:12:45,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 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) [2024-06-21 20:12:45,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:45,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:45,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:12:45,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:45,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1566017158, now seen corresponding path program 1 times [2024-06-21 20:12:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:45,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518629820] [2024-06-21 20:12:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:45,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:45,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:45,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518629820] [2024-06-21 20:12:45,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518629820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:45,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:45,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:45,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767173187] [2024-06-21 20:12:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:45,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:45,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:45,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:45,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:45,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:45,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:45,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:45,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:45,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:45,648 INFO L124 PetriNetUnfolderBase]: 4700/6991 cut-off events. [2024-06-21 20:12:45,649 INFO L125 PetriNetUnfolderBase]: For 38876/38905 co-relation queries the response was YES. [2024-06-21 20:12:45,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29533 conditions, 6991 events. 4700/6991 cut-off events. For 38876/38905 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39520 event pairs, 1793 based on Foata normal form. 24/6997 useless extension candidates. Maximal degree in co-relation 29498. Up to 6271 conditions per place. [2024-06-21 20:12:45,696 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 83 selfloop transitions, 44 changer transitions 0/136 dead transitions. [2024-06-21 20:12:45,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1330 flow [2024-06-21 20:12:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-21 20:12:45,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-21 20:12:45,698 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 869 flow. Second operand 5 states and 162 transitions. [2024-06-21 20:12:45,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1330 flow [2024-06-21 20:12:45,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 1260 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:45,760 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 953 flow [2024-06-21 20:12:45,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=953, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2024-06-21 20:12:45,761 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-06-21 20:12:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 953 flow [2024-06-21 20:12:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:45,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:45,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:12:45,762 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2040553880, now seen corresponding path program 2 times [2024-06-21 20:12:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748401419] [2024-06-21 20:12:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:45,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:45,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748401419] [2024-06-21 20:12:45,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748401419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:45,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:45,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:45,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203013425] [2024-06-21 20:12:45,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:45,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:45,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:45,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:45,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:45,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:45,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:46,354 INFO L124 PetriNetUnfolderBase]: 4681/6980 cut-off events. [2024-06-21 20:12:46,354 INFO L125 PetriNetUnfolderBase]: For 37988/38008 co-relation queries the response was YES. [2024-06-21 20:12:46,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29398 conditions, 6980 events. 4681/6980 cut-off events. For 37988/38008 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39556 event pairs, 1744 based on Foata normal form. 18/6991 useless extension candidates. Maximal degree in co-relation 29363. Up to 6324 conditions per place. [2024-06-21 20:12:46,398 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 95 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2024-06-21 20:12:46,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1284 flow [2024-06-21 20:12:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 20:12:46,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 20:12:46,399 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 953 flow. Second operand 5 states and 161 transitions. [2024-06-21 20:12:46,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1284 flow [2024-06-21 20:12:46,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1137 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:46,466 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 886 flow [2024-06-21 20:12:46,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=886, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-21 20:12:46,466 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2024-06-21 20:12:46,466 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 886 flow [2024-06-21 20:12:46,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:46,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:46,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:46,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:12:46,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:46,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554221, now seen corresponding path program 1 times [2024-06-21 20:12:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:46,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794085722] [2024-06-21 20:12:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:46,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794085722] [2024-06-21 20:12:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794085722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:46,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590271111] [2024-06-21 20:12:46,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:46,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:46,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 886 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:46,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:46,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:46,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:47,103 INFO L124 PetriNetUnfolderBase]: 4740/7036 cut-off events. [2024-06-21 20:12:47,103 INFO L125 PetriNetUnfolderBase]: For 41737/41757 co-relation queries the response was YES. [2024-06-21 20:12:47,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30075 conditions, 7036 events. 4740/7036 cut-off events. For 41737/41757 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39474 event pairs, 1735 based on Foata normal form. 17/7046 useless extension candidates. Maximal degree in co-relation 30040. Up to 6483 conditions per place. [2024-06-21 20:12:47,145 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 94 selfloop transitions, 31 changer transitions 0/134 dead transitions. [2024-06-21 20:12:47,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1293 flow [2024-06-21 20:12:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-21 20:12:47,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:12:47,146 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 886 flow. Second operand 5 states and 150 transitions. [2024-06-21 20:12:47,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1293 flow [2024-06-21 20:12:47,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 134 transitions, 1231 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:12:47,204 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1017 flow [2024-06-21 20:12:47,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1017, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-21 20:12:47,205 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-21 20:12:47,205 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1017 flow [2024-06-21 20:12:47,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:47,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:47,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:47,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:12:47,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:47,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:47,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1998559149, now seen corresponding path program 2 times [2024-06-21 20:12:47,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:47,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823964684] [2024-06-21 20:12:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:47,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:47,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823964684] [2024-06-21 20:12:47,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823964684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:47,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:47,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390789549] [2024-06-21 20:12:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:47,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:47,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:47,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:47,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:47,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:47,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:47,865 INFO L124 PetriNetUnfolderBase]: 4754/7037 cut-off events. [2024-06-21 20:12:47,865 INFO L125 PetriNetUnfolderBase]: For 50596/50619 co-relation queries the response was YES. [2024-06-21 20:12:47,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32364 conditions, 7037 events. 4754/7037 cut-off events. For 50596/50619 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39284 event pairs, 1749 based on Foata normal form. 19/7043 useless extension candidates. Maximal degree in co-relation 32327. Up to 6463 conditions per place. [2024-06-21 20:12:47,914 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 42 changer transitions 0/152 dead transitions. [2024-06-21 20:12:47,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1547 flow [2024-06-21 20:12:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-21 20:12:47,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:12:47,917 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1017 flow. Second operand 5 states and 154 transitions. [2024-06-21 20:12:47,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1547 flow [2024-06-21 20:12:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1504 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 20:12:47,998 INFO L231 Difference]: Finished difference. Result has 94 places, 131 transitions, 1242 flow [2024-06-21 20:12:47,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1242, PETRI_PLACES=94, PETRI_TRANSITIONS=131} [2024-06-21 20:12:47,999 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-06-21 20:12:47,999 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 131 transitions, 1242 flow [2024-06-21 20:12:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:48,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:48,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:48,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:12:48,000 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:48,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1825918293, now seen corresponding path program 1 times [2024-06-21 20:12:48,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:48,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977774215] [2024-06-21 20:12:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:48,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977774215] [2024-06-21 20:12:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977774215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:48,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:48,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:48,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823978078] [2024-06-21 20:12:48,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:48,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:48,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:48,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 131 transitions, 1242 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:48,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:48,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:48,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:48,638 INFO L124 PetriNetUnfolderBase]: 4802/7181 cut-off events. [2024-06-21 20:12:48,638 INFO L125 PetriNetUnfolderBase]: For 61748/61748 co-relation queries the response was YES. [2024-06-21 20:12:48,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35155 conditions, 7181 events. 4802/7181 cut-off events. For 61748/61748 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40606 event pairs, 1719 based on Foata normal form. 3/7175 useless extension candidates. Maximal degree in co-relation 35115. Up to 6525 conditions per place. [2024-06-21 20:12:48,757 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 149 selfloop transitions, 32 changer transitions 0/190 dead transitions. [2024-06-21 20:12:48,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 190 transitions, 2048 flow [2024-06-21 20:12:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:12:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:12:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 20:12:48,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:12:48,760 INFO L175 Difference]: Start difference. First operand has 94 places, 131 transitions, 1242 flow. Second operand 6 states and 186 transitions. [2024-06-21 20:12:48,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 190 transitions, 2048 flow [2024-06-21 20:12:48,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 190 transitions, 1968 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-06-21 20:12:48,840 INFO L231 Difference]: Finished difference. Result has 102 places, 151 transitions, 1449 flow [2024-06-21 20:12:48,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=102, PETRI_TRANSITIONS=151} [2024-06-21 20:12:48,840 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-21 20:12:48,840 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 151 transitions, 1449 flow [2024-06-21 20:12:48,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:48,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:48,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:48,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:12:48,841 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:48,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1998565101, now seen corresponding path program 2 times [2024-06-21 20:12:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698694983] [2024-06-21 20:12:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:48,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698694983] [2024-06-21 20:12:48,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698694983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:48,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:48,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378914881] [2024-06-21 20:12:48,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:48,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:48,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:48,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 151 transitions, 1449 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:48,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:48,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:48,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:49,484 INFO L124 PetriNetUnfolderBase]: 4839/7240 cut-off events. [2024-06-21 20:12:49,485 INFO L125 PetriNetUnfolderBase]: For 67912/67921 co-relation queries the response was YES. [2024-06-21 20:12:49,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36369 conditions, 7240 events. 4839/7240 cut-off events. For 67912/67921 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41079 event pairs, 1715 based on Foata normal form. 9/7242 useless extension candidates. Maximal degree in co-relation 36324. Up to 6597 conditions per place. [2024-06-21 20:12:49,540 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 158 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-21 20:12:49,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 2222 flow [2024-06-21 20:12:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-21 20:12:49,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151603498542274 [2024-06-21 20:12:49,541 INFO L175 Difference]: Start difference. First operand has 102 places, 151 transitions, 1449 flow. Second operand 7 states and 211 transitions. [2024-06-21 20:12:49,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 2222 flow [2024-06-21 20:12:49,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 2134 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-21 20:12:49,631 INFO L231 Difference]: Finished difference. Result has 109 places, 163 transitions, 1590 flow [2024-06-21 20:12:49,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1590, PETRI_PLACES=109, PETRI_TRANSITIONS=163} [2024-06-21 20:12:49,631 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-21 20:12:49,631 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 163 transitions, 1590 flow [2024-06-21 20:12:49,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:49,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:49,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:12:49,632 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:49,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1998357711, now seen corresponding path program 3 times [2024-06-21 20:12:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:49,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618882454] [2024-06-21 20:12:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:49,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618882454] [2024-06-21 20:12:49,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618882454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:49,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:49,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:49,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926683365] [2024-06-21 20:12:49,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:49,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:49,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:49,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:49,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:49,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 163 transitions, 1590 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:49,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:49,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:49,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:50,334 INFO L124 PetriNetUnfolderBase]: 4831/7229 cut-off events. [2024-06-21 20:12:50,335 INFO L125 PetriNetUnfolderBase]: For 76855/76855 co-relation queries the response was YES. [2024-06-21 20:12:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37340 conditions, 7229 events. 4831/7229 cut-off events. For 76855/76855 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40938 event pairs, 1720 based on Foata normal form. 3/7223 useless extension candidates. Maximal degree in co-relation 37292. Up to 6591 conditions per place. [2024-06-21 20:12:50,383 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 152 selfloop transitions, 31 changer transitions 0/192 dead transitions. [2024-06-21 20:12:50,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 192 transitions, 2139 flow [2024-06-21 20:12:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-21 20:12:50,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2024-06-21 20:12:50,384 INFO L175 Difference]: Start difference. First operand has 109 places, 163 transitions, 1590 flow. Second operand 5 states and 157 transitions. [2024-06-21 20:12:50,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 192 transitions, 2139 flow [2024-06-21 20:12:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 192 transitions, 2049 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:50,508 INFO L231 Difference]: Finished difference. Result has 111 places, 163 transitions, 1573 flow [2024-06-21 20:12:50,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1573, PETRI_PLACES=111, PETRI_TRANSITIONS=163} [2024-06-21 20:12:50,509 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-21 20:12:50,509 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 163 transitions, 1573 flow [2024-06-21 20:12:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:50,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:50,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:50,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:12:50,509 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:50,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:50,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1998573037, now seen corresponding path program 1 times [2024-06-21 20:12:50,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:50,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212076273] [2024-06-21 20:12:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:50,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:50,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:50,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212076273] [2024-06-21 20:12:50,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212076273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:50,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:50,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635889341] [2024-06-21 20:12:50,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:50,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:50,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:50,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:50,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 163 transitions, 1573 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:50,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:50,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:50,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:51,152 INFO L124 PetriNetUnfolderBase]: 4881/7298 cut-off events. [2024-06-21 20:12:51,152 INFO L125 PetriNetUnfolderBase]: For 84365/84371 co-relation queries the response was YES. [2024-06-21 20:12:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38168 conditions, 7298 events. 4881/7298 cut-off events. For 84365/84371 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 41356 event pairs, 1709 based on Foata normal form. 16/7307 useless extension candidates. Maximal degree in co-relation 38118. Up to 6672 conditions per place. [2024-06-21 20:12:51,206 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 166 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-21 20:12:51,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 2129 flow [2024-06-21 20:12:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:12:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:12:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-21 20:12:51,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-06-21 20:12:51,207 INFO L175 Difference]: Start difference. First operand has 111 places, 163 transitions, 1573 flow. Second operand 5 states and 153 transitions. [2024-06-21 20:12:51,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 2129 flow [2024-06-21 20:12:51,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 193 transitions, 2067 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:12:51,345 INFO L231 Difference]: Finished difference. Result has 112 places, 166 transitions, 1606 flow [2024-06-21 20:12:51,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1606, PETRI_PLACES=112, PETRI_TRANSITIONS=166} [2024-06-21 20:12:51,346 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-21 20:12:51,346 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 166 transitions, 1606 flow [2024-06-21 20:12:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-21 20:12:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:12:51,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:51,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1997772327, now seen corresponding path program 1 times [2024-06-21 20:12:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:51,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056084499] [2024-06-21 20:12:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:51,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056084499] [2024-06-21 20:12:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056084499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:51,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:51,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:12:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195117747] [2024-06-21 20:12:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:51,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:12:51,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:12:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:12:51,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:51,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 166 transitions, 1606 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:51,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:51,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:51,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:51,951 INFO L124 PetriNetUnfolderBase]: 4603/6896 cut-off events. [2024-06-21 20:12:51,952 INFO L125 PetriNetUnfolderBase]: For 99668/99700 co-relation queries the response was YES. [2024-06-21 20:12:51,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6896 events. 4603/6896 cut-off events. For 99668/99700 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 39683 event pairs, 1625 based on Foata normal form. 8/6769 useless extension candidates. Maximal degree in co-relation 37899. Up to 6211 conditions per place. [2024-06-21 20:12:52,002 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-06-21 20:12:52,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 1978 flow [2024-06-21 20:12:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:12:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:12:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 20:12:52,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 20:12:52,004 INFO L175 Difference]: Start difference. First operand has 112 places, 166 transitions, 1606 flow. Second operand 4 states and 122 transitions. [2024-06-21 20:12:52,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 1978 flow [2024-06-21 20:12:52,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 179 transitions, 1915 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:52,147 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 1625 flow [2024-06-21 20:12:52,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1625, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2024-06-21 20:12:52,148 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 62 predicate places. [2024-06-21 20:12:52,148 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 1625 flow [2024-06-21 20:12:52,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:52,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:52,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:52,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:12:52,149 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:52,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1301890499, now seen corresponding path program 1 times [2024-06-21 20:12:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:52,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294859416] [2024-06-21 20:12:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:52,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:52,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294859416] [2024-06-21 20:12:52,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294859416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:52,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:52,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339047159] [2024-06-21 20:12:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:52,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:52,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:52,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:52,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:52,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 1625 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) [2024-06-21 20:12:52,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:52,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:52,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:52,920 INFO L124 PetriNetUnfolderBase]: 5162/7712 cut-off events. [2024-06-21 20:12:52,920 INFO L125 PetriNetUnfolderBase]: For 104655/104678 co-relation queries the response was YES. [2024-06-21 20:12:52,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41852 conditions, 7712 events. 5162/7712 cut-off events. For 104655/104678 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44271 event pairs, 1717 based on Foata normal form. 22/7716 useless extension candidates. Maximal degree in co-relation 41799. Up to 6479 conditions per place. [2024-06-21 20:12:52,984 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 129 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-21 20:12:52,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 244 transitions, 2851 flow [2024-06-21 20:12:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:12:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:12:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-21 20:12:52,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-21 20:12:52,985 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 1625 flow. Second operand 9 states and 278 transitions. [2024-06-21 20:12:52,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 244 transitions, 2851 flow [2024-06-21 20:12:53,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 244 transitions, 2833 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 20:12:53,163 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 2171 flow [2024-06-21 20:12:53,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-06-21 20:12:53,163 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 73 predicate places. [2024-06-21 20:12:53,164 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 2171 flow [2024-06-21 20:12:53,164 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) [2024-06-21 20:12:53,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:53,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:12:53,164 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:53,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1167338017, now seen corresponding path program 2 times [2024-06-21 20:12:53,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:53,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723643239] [2024-06-21 20:12:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:53,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723643239] [2024-06-21 20:12:53,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723643239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:53,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:53,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475756653] [2024-06-21 20:12:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:53,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:53,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 2171 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) [2024-06-21 20:12:53,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:53,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:53,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:54,176 INFO L124 PetriNetUnfolderBase]: 5447/8161 cut-off events. [2024-06-21 20:12:54,176 INFO L125 PetriNetUnfolderBase]: For 128557/128577 co-relation queries the response was YES. [2024-06-21 20:12:54,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49027 conditions, 8161 events. 5447/8161 cut-off events. For 128557/128577 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 47199 event pairs, 1724 based on Foata normal form. 20/8174 useless extension candidates. Maximal degree in co-relation 48969. Up to 7040 conditions per place. [2024-06-21 20:12:54,261 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 182 selfloop transitions, 80 changer transitions 0/271 dead transitions. [2024-06-21 20:12:54,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 271 transitions, 3527 flow [2024-06-21 20:12:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:12:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:12:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-21 20:12:54,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-21 20:12:54,262 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 2171 flow. Second operand 7 states and 226 transitions. [2024-06-21 20:12:54,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 271 transitions, 3527 flow [2024-06-21 20:12:54,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 271 transitions, 3295 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:54,573 INFO L231 Difference]: Finished difference. Result has 131 places, 222 transitions, 2621 flow [2024-06-21 20:12:54,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=131, PETRI_TRANSITIONS=222} [2024-06-21 20:12:54,574 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-21 20:12:54,574 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 222 transitions, 2621 flow [2024-06-21 20:12:54,574 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) [2024-06-21 20:12:54,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:54,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:54,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:12:54,575 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:54,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1167327787, now seen corresponding path program 3 times [2024-06-21 20:12:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:54,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866530122] [2024-06-21 20:12:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:54,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:54,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866530122] [2024-06-21 20:12:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866530122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:54,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:54,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797868830] [2024-06-21 20:12:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:54,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:54,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:54,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 222 transitions, 2621 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) [2024-06-21 20:12:54,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:54,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:54,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:55,660 INFO L124 PetriNetUnfolderBase]: 5480/8215 cut-off events. [2024-06-21 20:12:55,660 INFO L125 PetriNetUnfolderBase]: For 141917/141939 co-relation queries the response was YES. [2024-06-21 20:12:55,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51145 conditions, 8215 events. 5480/8215 cut-off events. For 141917/141939 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47640 event pairs, 1722 based on Foata normal form. 22/8230 useless extension candidates. Maximal degree in co-relation 51083. Up to 7078 conditions per place. [2024-06-21 20:12:55,746 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 174 selfloop transitions, 95 changer transitions 0/278 dead transitions. [2024-06-21 20:12:55,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 278 transitions, 3696 flow [2024-06-21 20:12:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:12:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:12:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-06-21 20:12:55,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-06-21 20:12:55,747 INFO L175 Difference]: Start difference. First operand has 131 places, 222 transitions, 2621 flow. Second operand 8 states and 246 transitions. [2024-06-21 20:12:55,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 278 transitions, 3696 flow [2024-06-21 20:12:56,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 278 transitions, 3579 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-21 20:12:56,130 INFO L231 Difference]: Finished difference. Result has 139 places, 236 transitions, 3013 flow [2024-06-21 20:12:56,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=139, PETRI_TRANSITIONS=236} [2024-06-21 20:12:56,131 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2024-06-21 20:12:56,131 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 236 transitions, 3013 flow [2024-06-21 20:12:56,131 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) [2024-06-21 20:12:56,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:56,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:56,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:12:56,132 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:56,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1894796869, now seen corresponding path program 4 times [2024-06-21 20:12:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:56,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477293405] [2024-06-21 20:12:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:56,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:56,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477293405] [2024-06-21 20:12:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477293405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:56,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:12:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249156972] [2024-06-21 20:12:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:56,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:12:56,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:56,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:12:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:12:56,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:12:56,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 236 transitions, 3013 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) [2024-06-21 20:12:56,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:56,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:12:56,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:57,188 INFO L124 PetriNetUnfolderBase]: 5790/8677 cut-off events. [2024-06-21 20:12:57,188 INFO L125 PetriNetUnfolderBase]: For 164305/164327 co-relation queries the response was YES. [2024-06-21 20:12:57,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56001 conditions, 8677 events. 5790/8677 cut-off events. For 164305/164327 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50698 event pairs, 1726 based on Foata normal form. 22/8686 useless extension candidates. Maximal degree in co-relation 55935. Up to 7145 conditions per place. [2024-06-21 20:12:57,263 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 170 selfloop transitions, 148 changer transitions 0/327 dead transitions. [2024-06-21 20:12:57,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 327 transitions, 4621 flow [2024-06-21 20:12:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:12:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:12:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-06-21 20:12:57,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:12:57,266 INFO L175 Difference]: Start difference. First operand has 139 places, 236 transitions, 3013 flow. Second operand 9 states and 279 transitions. [2024-06-21 20:12:57,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 327 transitions, 4621 flow [2024-06-21 20:12:57,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 327 transitions, 4498 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:57,596 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3776 flow [2024-06-21 20:12:57,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3776, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2024-06-21 20:12:57,597 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-21 20:12:57,597 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3776 flow [2024-06-21 20:12:57,597 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) [2024-06-21 20:12:57,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:12:57,597 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:57,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash 766031489, now seen corresponding path program 1 times [2024-06-21 20:12:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:57,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491722943] [2024-06-21 20:12:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:57,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491722943] [2024-06-21 20:12:57,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491722943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:57,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:57,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811309347] [2024-06-21 20:12:57,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:57,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:57,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3776 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:57,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:57,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:57,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:12:58,632 INFO L124 PetriNetUnfolderBase]: 5928/8844 cut-off events. [2024-06-21 20:12:58,632 INFO L125 PetriNetUnfolderBase]: For 204726/204754 co-relation queries the response was YES. [2024-06-21 20:12:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62099 conditions, 8844 events. 5928/8844 cut-off events. For 204726/204754 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52071 event pairs, 1488 based on Foata normal form. 29/8840 useless extension candidates. Maximal degree in co-relation 62029. Up to 7108 conditions per place. [2024-06-21 20:12:58,719 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 229 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-21 20:12:58,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 321 transitions, 4898 flow [2024-06-21 20:12:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:12:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:12:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-21 20:12:58,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-21 20:12:58,721 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3776 flow. Second operand 6 states and 199 transitions. [2024-06-21 20:12:58,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 321 transitions, 4898 flow [2024-06-21 20:12:59,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 321 transitions, 4689 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-21 20:12:59,146 INFO L231 Difference]: Finished difference. Result has 150 places, 279 transitions, 3851 flow [2024-06-21 20:12:59,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3851, PETRI_PLACES=150, PETRI_TRANSITIONS=279} [2024-06-21 20:12:59,146 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-21 20:12:59,146 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 279 transitions, 3851 flow [2024-06-21 20:12:59,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:59,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:12:59,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:12:59,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:12:59,147 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:12:59,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:12:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash -91723291, now seen corresponding path program 2 times [2024-06-21 20:12:59,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:12:59,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504060081] [2024-06-21 20:12:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:12:59,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:12:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:12:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:12:59,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:12:59,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504060081] [2024-06-21 20:12:59,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504060081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:12:59,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:12:59,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:12:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892050437] [2024-06-21 20:12:59,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:12:59,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:12:59,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:12:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:12:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:12:59,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:12:59,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 279 transitions, 3851 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:12:59,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:12:59,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:12:59,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:00,273 INFO L124 PetriNetUnfolderBase]: 6071/9042 cut-off events. [2024-06-21 20:13:00,273 INFO L125 PetriNetUnfolderBase]: For 220392/220420 co-relation queries the response was YES. [2024-06-21 20:13:00,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64188 conditions, 9042 events. 6071/9042 cut-off events. For 220392/220420 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53310 event pairs, 1770 based on Foata normal form. 29/9038 useless extension candidates. Maximal degree in co-relation 64116. Up to 7781 conditions per place. [2024-06-21 20:13:00,351 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 226 selfloop transitions, 68 changer transitions 0/315 dead transitions. [2024-06-21 20:13:00,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 315 transitions, 4783 flow [2024-06-21 20:13:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-21 20:13:00,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-21 20:13:00,352 INFO L175 Difference]: Start difference. First operand has 150 places, 279 transitions, 3851 flow. Second operand 6 states and 191 transitions. [2024-06-21 20:13:00,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 315 transitions, 4783 flow [2024-06-21 20:13:00,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 315 transitions, 4635 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 20:13:00,739 INFO L231 Difference]: Finished difference. Result has 154 places, 282 transitions, 3921 flow [2024-06-21 20:13:00,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3921, PETRI_PLACES=154, PETRI_TRANSITIONS=282} [2024-06-21 20:13:00,740 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-06-21 20:13:00,740 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 282 transitions, 3921 flow [2024-06-21 20:13:00,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:00,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:00,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:13:00,742 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:00,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1819543111, now seen corresponding path program 3 times [2024-06-21 20:13:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523368180] [2024-06-21 20:13:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523368180] [2024-06-21 20:13:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523368180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:00,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:00,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:13:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431171405] [2024-06-21 20:13:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:00,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:13:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:13:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:13:00,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:13:00,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 282 transitions, 3921 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:00,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:00,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:13:00,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:01,782 INFO L124 PetriNetUnfolderBase]: 6145/9170 cut-off events. [2024-06-21 20:13:01,783 INFO L125 PetriNetUnfolderBase]: For 226356/226384 co-relation queries the response was YES. [2024-06-21 20:13:01,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64383 conditions, 9170 events. 6145/9170 cut-off events. For 226356/226384 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54289 event pairs, 1461 based on Foata normal form. 29/9179 useless extension candidates. Maximal degree in co-relation 64309. Up to 7743 conditions per place. [2024-06-21 20:13:01,875 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 246 selfloop transitions, 55 changer transitions 0/322 dead transitions. [2024-06-21 20:13:01,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 322 transitions, 4681 flow [2024-06-21 20:13:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-21 20:13:01,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:13:01,876 INFO L175 Difference]: Start difference. First operand has 154 places, 282 transitions, 3921 flow. Second operand 6 states and 196 transitions. [2024-06-21 20:13:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 322 transitions, 4681 flow [2024-06-21 20:13:02,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 322 transitions, 4525 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:02,238 INFO L231 Difference]: Finished difference. Result has 156 places, 284 transitions, 3941 flow [2024-06-21 20:13:02,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3941, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2024-06-21 20:13:02,239 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2024-06-21 20:13:02,239 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 3941 flow [2024-06-21 20:13:02,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:02,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:02,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:02,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:13:02,239 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:02,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1703905575, now seen corresponding path program 1 times [2024-06-21 20:13:02,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:02,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844358699] [2024-06-21 20:13:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844358699] [2024-06-21 20:13:02,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844358699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:02,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:02,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723128170] [2024-06-21 20:13:02,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:02,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:02,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 3941 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) [2024-06-21 20:13:02,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:02,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:02,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:03,442 INFO L124 PetriNetUnfolderBase]: 6303/9333 cut-off events. [2024-06-21 20:13:03,443 INFO L125 PetriNetUnfolderBase]: For 233579/233607 co-relation queries the response was YES. [2024-06-21 20:13:03,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 9333 events. 6303/9333 cut-off events. For 233579/233607 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54700 event pairs, 1800 based on Foata normal form. 22/9336 useless extension candidates. Maximal degree in co-relation 65796. Up to 8365 conditions per place. [2024-06-21 20:13:03,526 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 243 selfloop transitions, 62 changer transitions 0/314 dead transitions. [2024-06-21 20:13:03,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 314 transitions, 4725 flow [2024-06-21 20:13:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:03,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 20:13:03,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 20:13:03,527 INFO L175 Difference]: Start difference. First operand has 156 places, 284 transitions, 3941 flow. Second operand 6 states and 185 transitions. [2024-06-21 20:13:03,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 314 transitions, 4725 flow [2024-06-21 20:13:03,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 314 transitions, 4593 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:03,975 INFO L231 Difference]: Finished difference. Result has 158 places, 284 transitions, 3942 flow [2024-06-21 20:13:03,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3942, PETRI_PLACES=158, PETRI_TRANSITIONS=284} [2024-06-21 20:13:03,976 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-21 20:13:03,976 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 284 transitions, 3942 flow [2024-06-21 20:13:03,976 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) [2024-06-21 20:13:03,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:03,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:03,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:13:03,977 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:03,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1037868265, now seen corresponding path program 1 times [2024-06-21 20:13:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:03,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334128845] [2024-06-21 20:13:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:03,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:04,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:04,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334128845] [2024-06-21 20:13:04,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334128845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:04,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:04,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556087070] [2024-06-21 20:13:04,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:04,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:04,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:04,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:04,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 284 transitions, 3942 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) [2024-06-21 20:13:04,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:04,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:04,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:05,158 INFO L124 PetriNetUnfolderBase]: 6570/9743 cut-off events. [2024-06-21 20:13:05,159 INFO L125 PetriNetUnfolderBase]: For 262301/262329 co-relation queries the response was YES. [2024-06-21 20:13:05,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69017 conditions, 9743 events. 6570/9743 cut-off events. For 262301/262329 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57608 event pairs, 1497 based on Foata normal form. 40/9763 useless extension candidates. Maximal degree in co-relation 68941. Up to 8192 conditions per place. [2024-06-21 20:13:05,256 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 255 selfloop transitions, 69 changer transitions 0/333 dead transitions. [2024-06-21 20:13:05,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 333 transitions, 5074 flow [2024-06-21 20:13:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-21 20:13:05,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:13:05,258 INFO L175 Difference]: Start difference. First operand has 158 places, 284 transitions, 3942 flow. Second operand 6 states and 196 transitions. [2024-06-21 20:13:05,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 333 transitions, 5074 flow [2024-06-21 20:13:05,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 333 transitions, 4908 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:05,685 INFO L231 Difference]: Finished difference. Result has 159 places, 290 transitions, 4068 flow [2024-06-21 20:13:05,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4068, PETRI_PLACES=159, PETRI_TRANSITIONS=290} [2024-06-21 20:13:05,685 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-21 20:13:05,685 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 290 transitions, 4068 flow [2024-06-21 20:13:05,685 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) [2024-06-21 20:13:05,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:05,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:05,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:13:05,686 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:05,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1030249705, now seen corresponding path program 2 times [2024-06-21 20:13:05,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:05,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587712777] [2024-06-21 20:13:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:05,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:05,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587712777] [2024-06-21 20:13:05,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587712777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:05,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:05,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:05,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96722948] [2024-06-21 20:13:05,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:05,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:05,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:05,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:05,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 290 transitions, 4068 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) [2024-06-21 20:13:05,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:05,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:05,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:07,045 INFO L124 PetriNetUnfolderBase]: 6695/9918 cut-off events. [2024-06-21 20:13:07,045 INFO L125 PetriNetUnfolderBase]: For 286866/286894 co-relation queries the response was YES. [2024-06-21 20:13:07,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71866 conditions, 9918 events. 6695/9918 cut-off events. For 286866/286894 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58755 event pairs, 1861 based on Foata normal form. 40/9938 useless extension candidates. Maximal degree in co-relation 71789. Up to 8803 conditions per place. [2024-06-21 20:13:07,174 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 253 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-21 20:13:07,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 327 transitions, 4988 flow [2024-06-21 20:13:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-21 20:13:07,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-21 20:13:07,175 INFO L175 Difference]: Start difference. First operand has 159 places, 290 transitions, 4068 flow. Second operand 6 states and 188 transitions. [2024-06-21 20:13:07,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 327 transitions, 4988 flow [2024-06-21 20:13:07,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 327 transitions, 4824 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 20:13:07,802 INFO L231 Difference]: Finished difference. Result has 163 places, 293 transitions, 4125 flow [2024-06-21 20:13:07,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4125, PETRI_PLACES=163, PETRI_TRANSITIONS=293} [2024-06-21 20:13:07,805 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-21 20:13:07,805 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 293 transitions, 4125 flow [2024-06-21 20:13:07,805 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) [2024-06-21 20:13:07,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:07,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:07,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:13:07,805 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:07,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1027102702, now seen corresponding path program 1 times [2024-06-21 20:13:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:07,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738165749] [2024-06-21 20:13:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:07,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:07,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:07,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738165749] [2024-06-21 20:13:07,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738165749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:07,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:07,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:07,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841590848] [2024-06-21 20:13:07,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:07,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:07,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:07,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 293 transitions, 4125 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) [2024-06-21 20:13:07,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:07,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:07,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:09,217 INFO L124 PetriNetUnfolderBase]: 6746/10012 cut-off events. [2024-06-21 20:13:09,217 INFO L125 PetriNetUnfolderBase]: For 286348/286360 co-relation queries the response was YES. [2024-06-21 20:13:09,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72052 conditions, 10012 events. 6746/10012 cut-off events. For 286348/286360 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59103 event pairs, 1815 based on Foata normal form. 11/10006 useless extension candidates. Maximal degree in co-relation 71973. Up to 8402 conditions per place. [2024-06-21 20:13:09,334 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 174 changer transitions 0/355 dead transitions. [2024-06-21 20:13:09,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 355 transitions, 5697 flow [2024-06-21 20:13:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:13:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:13:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-21 20:13:09,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-21 20:13:09,336 INFO L175 Difference]: Start difference. First operand has 163 places, 293 transitions, 4125 flow. Second operand 9 states and 278 transitions. [2024-06-21 20:13:09,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 355 transitions, 5697 flow [2024-06-21 20:13:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 355 transitions, 5538 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:10,038 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4623 flow [2024-06-21 20:13:10,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-21 20:13:10,039 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-21 20:13:10,039 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4623 flow [2024-06-21 20:13:10,039 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) [2024-06-21 20:13:10,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:10,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:13:10,039 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:10,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2091908333, now seen corresponding path program 2 times [2024-06-21 20:13:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550350281] [2024-06-21 20:13:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:10,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550350281] [2024-06-21 20:13:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550350281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:10,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:10,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:10,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110341590] [2024-06-21 20:13:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:10,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:10,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:10,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:10,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4623 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) [2024-06-21 20:13:10,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:10,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:10,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:11,422 INFO L124 PetriNetUnfolderBase]: 6739/9989 cut-off events. [2024-06-21 20:13:11,422 INFO L125 PetriNetUnfolderBase]: For 306710/306722 co-relation queries the response was YES. [2024-06-21 20:13:11,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73917 conditions, 9989 events. 6739/9989 cut-off events. For 306710/306722 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59150 event pairs, 1825 based on Foata normal form. 7/9980 useless extension candidates. Maximal degree in co-relation 73835. Up to 8972 conditions per place. [2024-06-21 20:13:11,518 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 257 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-21 20:13:11,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 331 transitions, 5331 flow [2024-06-21 20:13:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 20:13:11,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:13:11,519 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4623 flow. Second operand 6 states and 182 transitions. [2024-06-21 20:13:11,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 331 transitions, 5331 flow [2024-06-21 20:13:12,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 331 transitions, 4821 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:12,091 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4252 flow [2024-06-21 20:13:12,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4252, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-21 20:13:12,092 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-21 20:13:12,092 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4252 flow [2024-06-21 20:13:12,092 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) [2024-06-21 20:13:12,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:12,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:13:12,092 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:12,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:12,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1827418228, now seen corresponding path program 2 times [2024-06-21 20:13:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530405378] [2024-06-21 20:13:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:12,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:12,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530405378] [2024-06-21 20:13:12,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530405378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:12,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:12,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:12,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497770233] [2024-06-21 20:13:12,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:12,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:12,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:12,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:12,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4252 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) [2024-06-21 20:13:12,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:12,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:12,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:13,402 INFO L124 PetriNetUnfolderBase]: 6791/10103 cut-off events. [2024-06-21 20:13:13,402 INFO L125 PetriNetUnfolderBase]: For 312663/312685 co-relation queries the response was YES. [2024-06-21 20:13:13,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73678 conditions, 10103 events. 6791/10103 cut-off events. For 312663/312685 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59927 event pairs, 1786 based on Foata normal form. 22/10118 useless extension candidates. Maximal degree in co-relation 73595. Up to 8847 conditions per place. [2024-06-21 20:13:13,530 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 244 selfloop transitions, 101 changer transitions 0/354 dead transitions. [2024-06-21 20:13:13,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 354 transitions, 5471 flow [2024-06-21 20:13:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-21 20:13:13,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301020408163265 [2024-06-21 20:13:13,531 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4252 flow. Second operand 8 states and 247 transitions. [2024-06-21 20:13:13,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 354 transitions, 5471 flow [2024-06-21 20:13:14,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 354 transitions, 5243 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:14,247 INFO L231 Difference]: Finished difference. Result has 172 places, 312 transitions, 4379 flow [2024-06-21 20:13:14,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4379, PETRI_PLACES=172, PETRI_TRANSITIONS=312} [2024-06-21 20:13:14,247 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-21 20:13:14,247 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 312 transitions, 4379 flow [2024-06-21 20:13:14,247 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) [2024-06-21 20:13:14,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:14,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:14,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:13:14,248 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:14,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:14,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1811538478, now seen corresponding path program 3 times [2024-06-21 20:13:14,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:14,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38781935] [2024-06-21 20:13:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:14,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:14,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38781935] [2024-06-21 20:13:14,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38781935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:14,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:14,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824100156] [2024-06-21 20:13:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:14,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:14,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:14,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 312 transitions, 4379 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) [2024-06-21 20:13:14,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:14,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:14,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:15,499 INFO L124 PetriNetUnfolderBase]: 6770/10079 cut-off events. [2024-06-21 20:13:15,500 INFO L125 PetriNetUnfolderBase]: For 309382/309404 co-relation queries the response was YES. [2024-06-21 20:13:15,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73252 conditions, 10079 events. 6770/10079 cut-off events. For 309382/309404 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59868 event pairs, 1781 based on Foata normal form. 22/10094 useless extension candidates. Maximal degree in co-relation 73169. Up to 8831 conditions per place. [2024-06-21 20:13:15,613 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 248 selfloop transitions, 98 changer transitions 0/355 dead transitions. [2024-06-21 20:13:15,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 355 transitions, 5422 flow [2024-06-21 20:13:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-21 20:13:15,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-06-21 20:13:15,615 INFO L175 Difference]: Start difference. First operand has 172 places, 312 transitions, 4379 flow. Second operand 7 states and 225 transitions. [2024-06-21 20:13:15,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 355 transitions, 5422 flow [2024-06-21 20:13:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 355 transitions, 5207 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:13:16,527 INFO L231 Difference]: Finished difference. Result has 173 places, 312 transitions, 4385 flow [2024-06-21 20:13:16,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4385, PETRI_PLACES=173, PETRI_TRANSITIONS=312} [2024-06-21 20:13:16,527 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-21 20:13:16,528 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 312 transitions, 4385 flow [2024-06-21 20:13:16,528 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) [2024-06-21 20:13:16,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:16,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:16,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:13:16,528 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:16,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1827748905, now seen corresponding path program 3 times [2024-06-21 20:13:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:16,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235831037] [2024-06-21 20:13:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:16,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:16,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235831037] [2024-06-21 20:13:16,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235831037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:16,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:16,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:16,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411771919] [2024-06-21 20:13:16,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:16,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:16,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:16,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:16,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 312 transitions, 4385 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) [2024-06-21 20:13:16,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:16,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:16,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:17,849 INFO L124 PetriNetUnfolderBase]: 6856/10183 cut-off events. [2024-06-21 20:13:17,849 INFO L125 PetriNetUnfolderBase]: For 321347/321369 co-relation queries the response was YES. [2024-06-21 20:13:17,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73850 conditions, 10183 events. 6856/10183 cut-off events. For 321347/321369 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60702 event pairs, 1430 based on Foata normal form. 36/10212 useless extension candidates. Maximal degree in co-relation 73767. Up to 8883 conditions per place. [2024-06-21 20:13:17,970 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 288 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-21 20:13:17,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 352 transitions, 5227 flow [2024-06-21 20:13:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-21 20:13:17,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-21 20:13:17,971 INFO L175 Difference]: Start difference. First operand has 173 places, 312 transitions, 4385 flow. Second operand 6 states and 193 transitions. [2024-06-21 20:13:17,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 352 transitions, 5227 flow [2024-06-21 20:13:18,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 352 transitions, 4960 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:13:18,760 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 4292 flow [2024-06-21 20:13:18,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4292, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-06-21 20:13:18,761 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-21 20:13:18,761 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 4292 flow [2024-06-21 20:13:18,761 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) [2024-06-21 20:13:18,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:18,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:18,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:13:18,761 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:18,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:18,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1827410292, now seen corresponding path program 1 times [2024-06-21 20:13:18,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:18,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652500594] [2024-06-21 20:13:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:18,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:18,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:18,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652500594] [2024-06-21 20:13:18,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652500594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:18,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:18,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:18,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204376959] [2024-06-21 20:13:18,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:18,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:18,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:18,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 4292 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) [2024-06-21 20:13:18,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:18,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:18,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:20,055 INFO L124 PetriNetUnfolderBase]: 6945/10317 cut-off events. [2024-06-21 20:13:20,055 INFO L125 PetriNetUnfolderBase]: For 314655/314677 co-relation queries the response was YES. [2024-06-21 20:13:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74640 conditions, 10317 events. 6945/10317 cut-off events. For 314655/314677 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61246 event pairs, 1787 based on Foata normal form. 28/10338 useless extension candidates. Maximal degree in co-relation 74557. Up to 9347 conditions per place. [2024-06-21 20:13:20,177 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 294 selfloop transitions, 39 changer transitions 0/342 dead transitions. [2024-06-21 20:13:20,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 342 transitions, 5184 flow [2024-06-21 20:13:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 20:13:20,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:13:20,180 INFO L175 Difference]: Start difference. First operand has 171 places, 314 transitions, 4292 flow. Second operand 6 states and 179 transitions. [2024-06-21 20:13:20,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 342 transitions, 5184 flow [2024-06-21 20:13:20,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 342 transitions, 5056 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:20,934 INFO L231 Difference]: Finished difference. Result has 173 places, 317 transitions, 4334 flow [2024-06-21 20:13:20,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4334, PETRI_PLACES=173, PETRI_TRANSITIONS=317} [2024-06-21 20:13:20,935 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-21 20:13:20,935 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 317 transitions, 4334 flow [2024-06-21 20:13:20,935 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) [2024-06-21 20:13:20,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:20,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:13:20,935 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:20,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1528821840, now seen corresponding path program 1 times [2024-06-21 20:13:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836640033] [2024-06-21 20:13:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:20,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:20,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836640033] [2024-06-21 20:13:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836640033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:20,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:13:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051293365] [2024-06-21 20:13:20,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:20,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:13:20,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:13:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:13:21,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:13:21,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 317 transitions, 4334 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2024-06-21 20:13:21,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:21,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:13:21,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:22,121 INFO L124 PetriNetUnfolderBase]: 6600/9829 cut-off events. [2024-06-21 20:13:22,121 INFO L125 PetriNetUnfolderBase]: For 342021/342085 co-relation queries the response was YES. [2024-06-21 20:13:22,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 9829 events. 6600/9829 cut-off events. For 342021/342085 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59017 event pairs, 1640 based on Foata normal form. 13/9638 useless extension candidates. Maximal degree in co-relation 73784. Up to 8827 conditions per place. [2024-06-21 20:13:22,237 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 273 selfloop transitions, 33 changer transitions 0/332 dead transitions. [2024-06-21 20:13:22,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 332 transitions, 4984 flow [2024-06-21 20:13:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:13:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:13:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-21 20:13:22,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:13:22,238 INFO L175 Difference]: Start difference. First operand has 173 places, 317 transitions, 4334 flow. Second operand 5 states and 150 transitions. [2024-06-21 20:13:22,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 332 transitions, 4984 flow [2024-06-21 20:13:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 332 transitions, 4856 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:22,955 INFO L231 Difference]: Finished difference. Result has 174 places, 317 transitions, 4290 flow [2024-06-21 20:13:22,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4290, PETRI_PLACES=174, PETRI_TRANSITIONS=317} [2024-06-21 20:13:22,956 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-21 20:13:22,956 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 317 transitions, 4290 flow [2024-06-21 20:13:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2024-06-21 20:13:22,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:22,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:13:22,957 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:22,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1451686352, now seen corresponding path program 4 times [2024-06-21 20:13:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:22,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074410450] [2024-06-21 20:13:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:23,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:23,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074410450] [2024-06-21 20:13:23,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074410450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:23,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:23,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947977609] [2024-06-21 20:13:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:23,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:23,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:23,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:23,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 317 transitions, 4290 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) [2024-06-21 20:13:23,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:23,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:23,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:24,266 INFO L124 PetriNetUnfolderBase]: 7008/10367 cut-off events. [2024-06-21 20:13:24,266 INFO L125 PetriNetUnfolderBase]: For 342363/342369 co-relation queries the response was YES. [2024-06-21 20:13:24,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75993 conditions, 10367 events. 7008/10367 cut-off events. For 342363/342369 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61143 event pairs, 1924 based on Foata normal form. 4/10336 useless extension candidates. Maximal degree in co-relation 75908. Up to 8445 conditions per place. [2024-06-21 20:13:24,390 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 213 changer transitions 0/394 dead transitions. [2024-06-21 20:13:24,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 394 transitions, 6179 flow [2024-06-21 20:13:24,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-21 20:13:24,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501457725947521 [2024-06-21 20:13:24,391 INFO L175 Difference]: Start difference. First operand has 174 places, 317 transitions, 4290 flow. Second operand 7 states and 223 transitions. [2024-06-21 20:13:24,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 394 transitions, 6179 flow [2024-06-21 20:13:25,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 394 transitions, 6095 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:25,084 INFO L231 Difference]: Finished difference. Result has 179 places, 352 transitions, 5392 flow [2024-06-21 20:13:25,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5392, PETRI_PLACES=179, PETRI_TRANSITIONS=352} [2024-06-21 20:13:25,085 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 127 predicate places. [2024-06-21 20:13:25,085 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 352 transitions, 5392 flow [2024-06-21 20:13:25,085 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) [2024-06-21 20:13:25,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:25,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:25,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:13:25,085 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:25,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash 571016720, now seen corresponding path program 5 times [2024-06-21 20:13:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:25,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569723100] [2024-06-21 20:13:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:25,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:25,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569723100] [2024-06-21 20:13:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569723100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:25,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:25,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924471227] [2024-06-21 20:13:25,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:25,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:25,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:25,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 352 transitions, 5392 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) [2024-06-21 20:13:25,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:25,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:25,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:26,572 INFO L124 PetriNetUnfolderBase]: 7000/10386 cut-off events. [2024-06-21 20:13:26,572 INFO L125 PetriNetUnfolderBase]: For 366779/366801 co-relation queries the response was YES. [2024-06-21 20:13:26,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81362 conditions, 10386 events. 7000/10386 cut-off events. For 366779/366801 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61786 event pairs, 1790 based on Foata normal form. 19/10398 useless extension candidates. Maximal degree in co-relation 81274. Up to 9378 conditions per place. [2024-06-21 20:13:26,698 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 325 selfloop transitions, 63 changer transitions 0/397 dead transitions. [2024-06-21 20:13:26,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 6422 flow [2024-06-21 20:13:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-21 20:13:26,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-21 20:13:26,699 INFO L175 Difference]: Start difference. First operand has 179 places, 352 transitions, 5392 flow. Second operand 8 states and 241 transitions. [2024-06-21 20:13:26,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 6422 flow [2024-06-21 20:13:27,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 397 transitions, 6238 flow, removed 92 selfloop flow, removed 0 redundant places. [2024-06-21 20:13:27,728 INFO L231 Difference]: Finished difference. Result has 188 places, 357 transitions, 5446 flow [2024-06-21 20:13:27,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=188, PETRI_TRANSITIONS=357} [2024-06-21 20:13:27,729 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-21 20:13:27,729 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 357 transitions, 5446 flow [2024-06-21 20:13:27,729 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) [2024-06-21 20:13:27,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:27,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:27,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:13:27,729 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:27,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 770704460, now seen corresponding path program 6 times [2024-06-21 20:13:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440029781] [2024-06-21 20:13:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440029781] [2024-06-21 20:13:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440029781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:27,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:27,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:27,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805266865] [2024-06-21 20:13:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:27,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:27,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 357 transitions, 5446 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) [2024-06-21 20:13:27,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:27,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:27,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:29,147 INFO L124 PetriNetUnfolderBase]: 7079/10512 cut-off events. [2024-06-21 20:13:29,147 INFO L125 PetriNetUnfolderBase]: For 370125/370147 co-relation queries the response was YES. [2024-06-21 20:13:29,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81543 conditions, 10512 events. 7079/10512 cut-off events. For 370125/370147 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 62470 event pairs, 1782 based on Foata normal form. 19/10518 useless extension candidates. Maximal degree in co-relation 81451. Up to 8881 conditions per place. [2024-06-21 20:13:29,277 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 229 selfloop transitions, 181 changer transitions 0/419 dead transitions. [2024-06-21 20:13:29,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 419 transitions, 7112 flow [2024-06-21 20:13:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:13:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:13:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-21 20:13:29,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454081632653061 [2024-06-21 20:13:29,278 INFO L175 Difference]: Start difference. First operand has 188 places, 357 transitions, 5446 flow. Second operand 8 states and 253 transitions. [2024-06-21 20:13:29,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 419 transitions, 7112 flow [2024-06-21 20:13:30,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 419 transitions, 6914 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:30,150 INFO L231 Difference]: Finished difference. Result has 194 places, 373 transitions, 5940 flow [2024-06-21 20:13:30,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5940, PETRI_PLACES=194, PETRI_TRANSITIONS=373} [2024-06-21 20:13:30,151 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-06-21 20:13:30,151 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 373 transitions, 5940 flow [2024-06-21 20:13:30,151 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) [2024-06-21 20:13:30,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:30,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:30,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:13:30,152 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:30,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1019570718, now seen corresponding path program 7 times [2024-06-21 20:13:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:30,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037815480] [2024-06-21 20:13:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:30,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037815480] [2024-06-21 20:13:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037815480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:30,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:30,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569784479] [2024-06-21 20:13:30,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:30,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:30,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:30,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:30,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:30,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 373 transitions, 5940 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) [2024-06-21 20:13:30,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:30,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:30,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:31,627 INFO L124 PetriNetUnfolderBase]: 7057/10484 cut-off events. [2024-06-21 20:13:31,627 INFO L125 PetriNetUnfolderBase]: For 389286/389308 co-relation queries the response was YES. [2024-06-21 20:13:31,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82959 conditions, 10484 events. 7057/10484 cut-off events. For 389286/389308 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62380 event pairs, 1782 based on Foata normal form. 22/10493 useless extension candidates. Maximal degree in co-relation 82864. Up to 8864 conditions per place. [2024-06-21 20:13:31,752 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 237 selfloop transitions, 177 changer transitions 0/423 dead transitions. [2024-06-21 20:13:31,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 423 transitions, 7424 flow [2024-06-21 20:13:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:13:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:13:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-21 20:13:31,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 20:13:31,754 INFO L175 Difference]: Start difference. First operand has 194 places, 373 transitions, 5940 flow. Second operand 9 states and 280 transitions. [2024-06-21 20:13:31,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 423 transitions, 7424 flow [2024-06-21 20:13:32,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 423 transitions, 7118 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:32,684 INFO L231 Difference]: Finished difference. Result has 199 places, 373 transitions, 6000 flow [2024-06-21 20:13:32,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=199, PETRI_TRANSITIONS=373} [2024-06-21 20:13:32,685 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 147 predicate places. [2024-06-21 20:13:32,685 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 373 transitions, 6000 flow [2024-06-21 20:13:32,685 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) [2024-06-21 20:13:32,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:32,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:13:32,686 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:32,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1148724974, now seen corresponding path program 8 times [2024-06-21 20:13:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456293805] [2024-06-21 20:13:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:32,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:32,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456293805] [2024-06-21 20:13:32,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456293805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:32,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:32,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:32,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540808863] [2024-06-21 20:13:32,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:32,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:32,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:32,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:32,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 373 transitions, 6000 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) [2024-06-21 20:13:32,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:32,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:32,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:34,126 INFO L124 PetriNetUnfolderBase]: 7044/10466 cut-off events. [2024-06-21 20:13:34,126 INFO L125 PetriNetUnfolderBase]: For 403391/403407 co-relation queries the response was YES. [2024-06-21 20:13:34,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 10466 events. 7044/10466 cut-off events. For 403391/403407 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62222 event pairs, 1800 based on Foata normal form. 15/10467 useless extension candidates. Maximal degree in co-relation 83260. Up to 8854 conditions per place. [2024-06-21 20:13:34,264 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 231 selfloop transitions, 177 changer transitions 0/417 dead transitions. [2024-06-21 20:13:34,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 417 transitions, 7351 flow [2024-06-21 20:13:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-21 20:13:34,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-21 20:13:34,266 INFO L175 Difference]: Start difference. First operand has 199 places, 373 transitions, 6000 flow. Second operand 7 states and 226 transitions. [2024-06-21 20:13:34,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 417 transitions, 7351 flow [2024-06-21 20:13:35,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 417 transitions, 7044 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:35,237 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 6295 flow [2024-06-21 20:13:35,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6295, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-06-21 20:13:35,238 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2024-06-21 20:13:35,238 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 6295 flow [2024-06-21 20:13:35,238 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) [2024-06-21 20:13:35,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:35,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:13:35,238 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:35,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1390826468, now seen corresponding path program 2 times [2024-06-21 20:13:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:35,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838823231] [2024-06-21 20:13:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838823231] [2024-06-21 20:13:35,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838823231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:35,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:35,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094028026] [2024-06-21 20:13:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:35,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:35,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:35,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:35,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 6295 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) [2024-06-21 20:13:35,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:35,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:35,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:36,733 INFO L124 PetriNetUnfolderBase]: 7115/10563 cut-off events. [2024-06-21 20:13:36,733 INFO L125 PetriNetUnfolderBase]: For 433050/433072 co-relation queries the response was YES. [2024-06-21 20:13:36,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85775 conditions, 10563 events. 7115/10563 cut-off events. For 433050/433072 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 62775 event pairs, 1803 based on Foata normal form. 28/10578 useless extension candidates. Maximal degree in co-relation 85676. Up to 9601 conditions per place. [2024-06-21 20:13:36,868 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 45 changer transitions 0/408 dead transitions. [2024-06-21 20:13:36,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 408 transitions, 7423 flow [2024-06-21 20:13:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 20:13:36,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:13:36,869 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 6295 flow. Second operand 6 states and 182 transitions. [2024-06-21 20:13:36,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 408 transitions, 7423 flow [2024-06-21 20:13:37,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 408 transitions, 7182 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:37,837 INFO L231 Difference]: Finished difference. Result has 205 places, 379 transitions, 6237 flow [2024-06-21 20:13:37,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6237, PETRI_PLACES=205, PETRI_TRANSITIONS=379} [2024-06-21 20:13:37,838 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2024-06-21 20:13:37,838 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 379 transitions, 6237 flow [2024-06-21 20:13:37,839 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) [2024-06-21 20:13:37,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:37,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:37,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:13:37,839 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:37,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 778330956, now seen corresponding path program 3 times [2024-06-21 20:13:37,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:37,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496890714] [2024-06-21 20:13:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:37,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:37,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496890714] [2024-06-21 20:13:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496890714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:37,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:37,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284915917] [2024-06-21 20:13:37,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:37,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:37,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:37,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:37,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 379 transitions, 6237 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) [2024-06-21 20:13:37,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:37,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:37,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:39,316 INFO L124 PetriNetUnfolderBase]: 7217/10701 cut-off events. [2024-06-21 20:13:39,316 INFO L125 PetriNetUnfolderBase]: For 460262/460284 co-relation queries the response was YES. [2024-06-21 20:13:39,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87315 conditions, 10701 events. 7217/10701 cut-off events. For 460262/460284 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 63565 event pairs, 1784 based on Foata normal form. 28/10716 useless extension candidates. Maximal degree in co-relation 87215. Up to 9520 conditions per place. [2024-06-21 20:13:39,452 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 55 changer transitions 0/418 dead transitions. [2024-06-21 20:13:39,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 418 transitions, 7547 flow [2024-06-21 20:13:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:13:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:13:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 20:13:39,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:13:39,453 INFO L175 Difference]: Start difference. First operand has 205 places, 379 transitions, 6237 flow. Second operand 6 states and 186 transitions. [2024-06-21 20:13:39,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 418 transitions, 7547 flow [2024-06-21 20:13:40,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 418 transitions, 7280 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:40,629 INFO L231 Difference]: Finished difference. Result has 206 places, 384 transitions, 6222 flow [2024-06-21 20:13:40,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6222, PETRI_PLACES=206, PETRI_TRANSITIONS=384} [2024-06-21 20:13:40,630 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-21 20:13:40,630 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 384 transitions, 6222 flow [2024-06-21 20:13:40,630 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) [2024-06-21 20:13:40,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:13:40,631 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:40,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash -8798344, now seen corresponding path program 2 times [2024-06-21 20:13:40,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:40,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509764105] [2024-06-21 20:13:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:40,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509764105] [2024-06-21 20:13:40,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509764105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:40,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:40,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:13:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693490712] [2024-06-21 20:13:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:13:40,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:13:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:13:40,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:13:40,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 384 transitions, 6222 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2024-06-21 20:13:40,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:40,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:13:40,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:42,022 INFO L124 PetriNetUnfolderBase]: 6909/10262 cut-off events. [2024-06-21 20:13:42,022 INFO L125 PetriNetUnfolderBase]: For 499309/499373 co-relation queries the response was YES. [2024-06-21 20:13:42,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86576 conditions, 10262 events. 6909/10262 cut-off events. For 499309/499373 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61717 event pairs, 1686 based on Foata normal form. 13/10067 useless extension candidates. Maximal degree in co-relation 86476. Up to 9206 conditions per place. [2024-06-21 20:13:42,160 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 327 selfloop transitions, 48 changer transitions 0/402 dead transitions. [2024-06-21 20:13:42,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 402 transitions, 7233 flow [2024-06-21 20:13:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:13:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:13:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-21 20:13:42,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:13:42,161 INFO L175 Difference]: Start difference. First operand has 206 places, 384 transitions, 6222 flow. Second operand 5 states and 150 transitions. [2024-06-21 20:13:42,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 402 transitions, 7233 flow [2024-06-21 20:13:43,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 402 transitions, 7106 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 20:13:43,087 INFO L231 Difference]: Finished difference. Result has 209 places, 388 transitions, 6274 flow [2024-06-21 20:13:43,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6274, PETRI_PLACES=209, PETRI_TRANSITIONS=388} [2024-06-21 20:13:43,087 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2024-06-21 20:13:43,088 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 388 transitions, 6274 flow [2024-06-21 20:13:43,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2024-06-21 20:13:43,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:43,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:13:43,088 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:43,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2022826474, now seen corresponding path program 1 times [2024-06-21 20:13:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:43,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880320060] [2024-06-21 20:13:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:43,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880320060] [2024-06-21 20:13:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880320060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:43,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:43,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:43,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083676679] [2024-06-21 20:13:43,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:43,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:43,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:43,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:43,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:43,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 388 transitions, 6274 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) [2024-06-21 20:13:43,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:43,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:43,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:44,827 INFO L124 PetriNetUnfolderBase]: 8045/11911 cut-off events. [2024-06-21 20:13:44,827 INFO L125 PetriNetUnfolderBase]: For 572306/572306 co-relation queries the response was YES. [2024-06-21 20:13:44,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96235 conditions, 11911 events. 8045/11911 cut-off events. For 572306/572306 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 71849 event pairs, 1969 based on Foata normal form. 36/11938 useless extension candidates. Maximal degree in co-relation 96133. Up to 9787 conditions per place. [2024-06-21 20:13:44,992 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 45 changer transitions 0/463 dead transitions. [2024-06-21 20:13:44,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 463 transitions, 8042 flow [2024-06-21 20:13:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-21 20:13:44,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-21 20:13:44,993 INFO L175 Difference]: Start difference. First operand has 209 places, 388 transitions, 6274 flow. Second operand 7 states and 226 transitions. [2024-06-21 20:13:44,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 463 transitions, 8042 flow [2024-06-21 20:13:46,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 463 transitions, 7891 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:13:46,420 INFO L231 Difference]: Finished difference. Result has 214 places, 396 transitions, 6381 flow [2024-06-21 20:13:46,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=214, PETRI_TRANSITIONS=396} [2024-06-21 20:13:46,421 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-21 20:13:46,421 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 396 transitions, 6381 flow [2024-06-21 20:13:46,421 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) [2024-06-21 20:13:46,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:46,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:46,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:13:46,422 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:46,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1451694288, now seen corresponding path program 2 times [2024-06-21 20:13:46,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:46,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130372281] [2024-06-21 20:13:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:46,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:46,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130372281] [2024-06-21 20:13:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130372281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:46,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:46,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687352104] [2024-06-21 20:13:46,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:46,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:46,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:46,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 396 transitions, 6381 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) [2024-06-21 20:13:46,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:46,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:46,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:48,253 INFO L124 PetriNetUnfolderBase]: 8322/12312 cut-off events. [2024-06-21 20:13:48,253 INFO L125 PetriNetUnfolderBase]: For 616901/616901 co-relation queries the response was YES. [2024-06-21 20:13:48,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100909 conditions, 12312 events. 8322/12312 cut-off events. For 616901/616901 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 74808 event pairs, 2189 based on Foata normal form. 42/12341 useless extension candidates. Maximal degree in co-relation 100806. Up to 11052 conditions per place. [2024-06-21 20:13:48,418 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 387 selfloop transitions, 44 changer transitions 0/440 dead transitions. [2024-06-21 20:13:48,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 440 transitions, 7649 flow [2024-06-21 20:13:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-21 20:13:48,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209912536443148 [2024-06-21 20:13:48,418 INFO L175 Difference]: Start difference. First operand has 214 places, 396 transitions, 6381 flow. Second operand 7 states and 213 transitions. [2024-06-21 20:13:48,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 440 transitions, 7649 flow [2024-06-21 20:13:49,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 440 transitions, 7513 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:13:49,974 INFO L231 Difference]: Finished difference. Result has 218 places, 398 transitions, 6401 flow [2024-06-21 20:13:49,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6401, PETRI_PLACES=218, PETRI_TRANSITIONS=398} [2024-06-21 20:13:49,974 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2024-06-21 20:13:49,974 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 398 transitions, 6401 flow [2024-06-21 20:13:49,974 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) [2024-06-21 20:13:49,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:49,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:49,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:13:49,975 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:49,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1451546418, now seen corresponding path program 3 times [2024-06-21 20:13:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:49,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136558456] [2024-06-21 20:13:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136558456] [2024-06-21 20:13:50,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136558456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:50,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:50,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897376033] [2024-06-21 20:13:50,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:50,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:50,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:50,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 398 transitions, 6401 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) [2024-06-21 20:13:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:50,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:52,237 INFO L124 PetriNetUnfolderBase]: 8830/13080 cut-off events. [2024-06-21 20:13:52,237 INFO L125 PetriNetUnfolderBase]: For 670113/670113 co-relation queries the response was YES. [2024-06-21 20:13:52,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107234 conditions, 13080 events. 8830/13080 cut-off events. For 670113/670113 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80529 event pairs, 2287 based on Foata normal form. 36/13107 useless extension candidates. Maximal degree in co-relation 107130. Up to 11193 conditions per place. [2024-06-21 20:13:52,736 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 399 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-21 20:13:52,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 453 transitions, 7892 flow [2024-06-21 20:13:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:13:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:13:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-21 20:13:52,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355685131195336 [2024-06-21 20:13:52,737 INFO L175 Difference]: Start difference. First operand has 218 places, 398 transitions, 6401 flow. Second operand 7 states and 218 transitions. [2024-06-21 20:13:52,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 453 transitions, 7892 flow [2024-06-21 20:13:54,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 453 transitions, 7771 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:13:54,134 INFO L231 Difference]: Finished difference. Result has 221 places, 403 transitions, 6500 flow [2024-06-21 20:13:54,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6500, PETRI_PLACES=221, PETRI_TRANSITIONS=403} [2024-06-21 20:13:54,135 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-21 20:13:54,135 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 403 transitions, 6500 flow [2024-06-21 20:13:54,135 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) [2024-06-21 20:13:54,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:54,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:54,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:13:54,136 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:54,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1021139242, now seen corresponding path program 1 times [2024-06-21 20:13:54,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:54,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485338370] [2024-06-21 20:13:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:54,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:54,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485338370] [2024-06-21 20:13:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485338370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:54,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:54,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:13:54,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107033915] [2024-06-21 20:13:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:13:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:13:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:13:54,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:54,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 403 transitions, 6500 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:54,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:54,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:54,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:13:56,292 INFO L124 PetriNetUnfolderBase]: 8837/13101 cut-off events. [2024-06-21 20:13:56,292 INFO L125 PetriNetUnfolderBase]: For 669886/669886 co-relation queries the response was YES. [2024-06-21 20:13:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108958 conditions, 13101 events. 8837/13101 cut-off events. For 669886/669886 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80674 event pairs, 2396 based on Foata normal form. 1/13098 useless extension candidates. Maximal degree in co-relation 108852. Up to 12162 conditions per place. [2024-06-21 20:13:56,444 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 408 selfloop transitions, 20 changer transitions 0/437 dead transitions. [2024-06-21 20:13:56,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 437 transitions, 7835 flow [2024-06-21 20:13:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:13:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:13:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-21 20:13:56,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:13:56,445 INFO L175 Difference]: Start difference. First operand has 221 places, 403 transitions, 6500 flow. Second operand 5 states and 147 transitions. [2024-06-21 20:13:56,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 437 transitions, 7835 flow [2024-06-21 20:13:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 437 transitions, 7720 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:13:57,935 INFO L231 Difference]: Finished difference. Result has 225 places, 418 transitions, 6819 flow [2024-06-21 20:13:57,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6819, PETRI_PLACES=225, PETRI_TRANSITIONS=418} [2024-06-21 20:13:57,936 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-21 20:13:57,936 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 418 transitions, 6819 flow [2024-06-21 20:13:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:13:57,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:13:57,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:13:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:13:57,937 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:13:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:13:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1769900910, now seen corresponding path program 4 times [2024-06-21 20:13:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:13:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755064766] [2024-06-21 20:13:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:13:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:13:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:13:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:13:58,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:13:58,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755064766] [2024-06-21 20:13:58,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755064766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:13:58,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:13:58,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:13:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571258568] [2024-06-21 20:13:58,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:13:58,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:13:58,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:13:58,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:13:58,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:13:58,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:13:58,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 418 transitions, 6819 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) [2024-06-21 20:13:58,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:13:58,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:13:58,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:00,410 INFO L124 PetriNetUnfolderBase]: 9063/13398 cut-off events. [2024-06-21 20:14:00,410 INFO L125 PetriNetUnfolderBase]: For 736057/736063 co-relation queries the response was YES. [2024-06-21 20:14:00,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111273 conditions, 13398 events. 9063/13398 cut-off events. For 736057/736063 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 82609 event pairs, 2412 based on Foata normal form. 46/13433 useless extension candidates. Maximal degree in co-relation 111163. Up to 12177 conditions per place. [2024-06-21 20:14:00,565 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 402 selfloop transitions, 50 changer transitions 0/461 dead transitions. [2024-06-21 20:14:00,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 461 transitions, 8020 flow [2024-06-21 20:14:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-21 20:14:00,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045918367346939 [2024-06-21 20:14:00,566 INFO L175 Difference]: Start difference. First operand has 225 places, 418 transitions, 6819 flow. Second operand 8 states and 237 transitions. [2024-06-21 20:14:00,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 461 transitions, 8020 flow [2024-06-21 20:14:01,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 461 transitions, 7994 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-21 20:14:01,818 INFO L231 Difference]: Finished difference. Result has 233 places, 420 transitions, 6969 flow [2024-06-21 20:14:01,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=233, PETRI_TRANSITIONS=420} [2024-06-21 20:14:01,819 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 181 predicate places. [2024-06-21 20:14:01,819 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 420 transitions, 6969 flow [2024-06-21 20:14:01,819 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) [2024-06-21 20:14:01,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:01,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:14:01,820 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:01,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash 571410606, now seen corresponding path program 5 times [2024-06-21 20:14:01,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:01,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192507857] [2024-06-21 20:14:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192507857] [2024-06-21 20:14:01,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192507857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:01,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:01,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:14:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849836952] [2024-06-21 20:14:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:01,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:14:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:14:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:14:01,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:01,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 420 transitions, 6969 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) [2024-06-21 20:14:01,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:01,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:01,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:04,313 INFO L124 PetriNetUnfolderBase]: 9301/13761 cut-off events. [2024-06-21 20:14:04,313 INFO L125 PetriNetUnfolderBase]: For 767406/767406 co-relation queries the response was YES. [2024-06-21 20:14:04,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114798 conditions, 13761 events. 9301/13761 cut-off events. For 767406/767406 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 85266 event pairs, 2496 based on Foata normal form. 42/13794 useless extension candidates. Maximal degree in co-relation 114685. Up to 12465 conditions per place. [2024-06-21 20:14:04,476 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 400 selfloop transitions, 46 changer transitions 0/455 dead transitions. [2024-06-21 20:14:04,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 455 transitions, 8144 flow [2024-06-21 20:14:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:14:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:14:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 20:14:04,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 20:14:04,477 INFO L175 Difference]: Start difference. First operand has 233 places, 420 transitions, 6969 flow. Second operand 6 states and 185 transitions. [2024-06-21 20:14:04,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 455 transitions, 8144 flow [2024-06-21 20:14:06,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 455 transitions, 8016 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:14:06,242 INFO L231 Difference]: Finished difference. Result has 234 places, 422 transitions, 7013 flow [2024-06-21 20:14:06,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7013, PETRI_PLACES=234, PETRI_TRANSITIONS=422} [2024-06-21 20:14:06,242 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-21 20:14:06,242 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 422 transitions, 7013 flow [2024-06-21 20:14:06,243 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) [2024-06-21 20:14:06,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:06,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:06,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:14:06,243 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:06,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1024865642, now seen corresponding path program 6 times [2024-06-21 20:14:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:06,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288317832] [2024-06-21 20:14:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288317832] [2024-06-21 20:14:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288317832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:06,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:14:06,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456897582] [2024-06-21 20:14:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:06,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:14:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:14:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:14:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:06,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 422 transitions, 7013 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) [2024-06-21 20:14:06,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:06,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:06,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:08,756 INFO L124 PetriNetUnfolderBase]: 9431/13967 cut-off events. [2024-06-21 20:14:08,757 INFO L125 PetriNetUnfolderBase]: For 778802/778802 co-relation queries the response was YES. [2024-06-21 20:14:08,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115973 conditions, 13967 events. 9431/13967 cut-off events. For 778802/778802 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 86785 event pairs, 2388 based on Foata normal form. 36/13994 useless extension candidates. Maximal degree in co-relation 115858. Up to 11752 conditions per place. [2024-06-21 20:14:08,919 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 412 selfloop transitions, 50 changer transitions 0/471 dead transitions. [2024-06-21 20:14:08,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 471 transitions, 8435 flow [2024-06-21 20:14:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:14:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:14:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 20:14:08,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 20:14:08,920 INFO L175 Difference]: Start difference. First operand has 234 places, 422 transitions, 7013 flow. Second operand 6 states and 194 transitions. [2024-06-21 20:14:08,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 471 transitions, 8435 flow [2024-06-21 20:14:10,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 471 transitions, 8298 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:14:10,816 INFO L231 Difference]: Finished difference. Result has 237 places, 426 transitions, 7116 flow [2024-06-21 20:14:10,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7116, PETRI_PLACES=237, PETRI_TRANSITIONS=426} [2024-06-21 20:14:10,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-21 20:14:10,817 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 426 transitions, 7116 flow [2024-06-21 20:14:10,817 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) [2024-06-21 20:14:10,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:10,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:10,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:14:10,818 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:10,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:10,818 INFO L85 PathProgramCache]: Analyzing trace with hash 778336908, now seen corresponding path program 1 times [2024-06-21 20:14:10,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:10,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790227793] [2024-06-21 20:14:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:10,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790227793] [2024-06-21 20:14:10,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790227793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:10,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:10,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:14:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206986075] [2024-06-21 20:14:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:10,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:14:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:14:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:14:10,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 426 transitions, 7116 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) [2024-06-21 20:14:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:10,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:13,268 INFO L124 PetriNetUnfolderBase]: 9515/14087 cut-off events. [2024-06-21 20:14:13,269 INFO L125 PetriNetUnfolderBase]: For 804628/804634 co-relation queries the response was YES. [2024-06-21 20:14:13,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117099 conditions, 14087 events. 9515/14087 cut-off events. For 804628/804634 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87693 event pairs, 2412 based on Foata normal form. 40/14118 useless extension candidates. Maximal degree in co-relation 116982. Up to 12298 conditions per place. [2024-06-21 20:14:13,674 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 57 changer transitions 0/475 dead transitions. [2024-06-21 20:14:13,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 475 transitions, 8400 flow [2024-06-21 20:14:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:14:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:14:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-21 20:14:13,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-21 20:14:13,675 INFO L175 Difference]: Start difference. First operand has 237 places, 426 transitions, 7116 flow. Second operand 8 states and 241 transitions. [2024-06-21 20:14:13,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 475 transitions, 8400 flow [2024-06-21 20:14:15,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 475 transitions, 8183 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 20:14:15,855 INFO L231 Difference]: Finished difference. Result has 240 places, 428 transitions, 7088 flow [2024-06-21 20:14:15,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7088, PETRI_PLACES=240, PETRI_TRANSITIONS=428} [2024-06-21 20:14:15,856 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 188 predicate places. [2024-06-21 20:14:15,856 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 428 transitions, 7088 flow [2024-06-21 20:14:15,856 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) [2024-06-21 20:14:15,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:15,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:14:15,856 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:15,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash -8792392, now seen corresponding path program 2 times [2024-06-21 20:14:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:15,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583595055] [2024-06-21 20:14:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583595055] [2024-06-21 20:14:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583595055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:15,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:15,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:14:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716121695] [2024-06-21 20:14:15,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:15,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:14:15,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:14:15,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:14:15,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:15,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 428 transitions, 7088 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:15,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:15,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:18,253 INFO L124 PetriNetUnfolderBase]: 9511/14080 cut-off events. [2024-06-21 20:14:18,253 INFO L125 PetriNetUnfolderBase]: For 781677/781677 co-relation queries the response was YES. [2024-06-21 20:14:18,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116171 conditions, 14080 events. 9511/14080 cut-off events. For 781677/781677 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87709 event pairs, 2593 based on Foata normal form. 1/14076 useless extension candidates. Maximal degree in co-relation 116054. Up to 13128 conditions per place. [2024-06-21 20:14:18,447 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 411 selfloop transitions, 20 changer transitions 0/440 dead transitions. [2024-06-21 20:14:18,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 440 transitions, 7980 flow [2024-06-21 20:14:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:14:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:14:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 20:14:18,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 20:14:18,448 INFO L175 Difference]: Start difference. First operand has 240 places, 428 transitions, 7088 flow. Second operand 5 states and 140 transitions. [2024-06-21 20:14:18,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 440 transitions, 7980 flow [2024-06-21 20:14:20,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 440 transitions, 7800 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 20:14:20,651 INFO L231 Difference]: Finished difference. Result has 238 places, 428 transitions, 6955 flow [2024-06-21 20:14:20,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6955, PETRI_PLACES=238, PETRI_TRANSITIONS=428} [2024-06-21 20:14:20,652 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 186 predicate places. [2024-06-21 20:14:20,652 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 428 transitions, 6955 flow [2024-06-21 20:14:20,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:20,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:20,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:20,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:14:20,652 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:20,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash -40953776, now seen corresponding path program 1 times [2024-06-21 20:14:20,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:20,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024671337] [2024-06-21 20:14:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:20,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:20,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:20,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024671337] [2024-06-21 20:14:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024671337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:20,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:20,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:14:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868235863] [2024-06-21 20:14:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:14:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:14:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:14:20,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 20:14:20,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 428 transitions, 6955 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2024-06-21 20:14:20,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:20,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 20:14:20,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:22,956 INFO L124 PetriNetUnfolderBase]: 9241/13734 cut-off events. [2024-06-21 20:14:22,956 INFO L125 PetriNetUnfolderBase]: For 818983/818983 co-relation queries the response was YES. [2024-06-21 20:14:23,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114190 conditions, 13734 events. 9241/13734 cut-off events. For 818983/818983 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 86127 event pairs, 2457 based on Foata normal form. 12/13546 useless extension candidates. Maximal degree in co-relation 114073. Up to 12527 conditions per place. [2024-06-21 20:14:23,393 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 392 selfloop transitions, 23 changer transitions 0/447 dead transitions. [2024-06-21 20:14:23,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 447 transitions, 7913 flow [2024-06-21 20:14:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:14:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:14:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-21 20:14:23,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-21 20:14:23,394 INFO L175 Difference]: Start difference. First operand has 238 places, 428 transitions, 6955 flow. Second operand 5 states and 148 transitions. [2024-06-21 20:14:23,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 447 transitions, 7913 flow [2024-06-21 20:14:24,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 447 transitions, 7884 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 20:14:24,962 INFO L231 Difference]: Finished difference. Result has 242 places, 431 transitions, 7052 flow [2024-06-21 20:14:24,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7052, PETRI_PLACES=242, PETRI_TRANSITIONS=431} [2024-06-21 20:14:24,962 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 190 predicate places. [2024-06-21 20:14:24,962 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 431 transitions, 7052 flow [2024-06-21 20:14:24,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2024-06-21 20:14:24,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:24,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:24,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:14:24,963 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:24,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1281256740, now seen corresponding path program 1 times [2024-06-21 20:14:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760815614] [2024-06-21 20:14:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:25,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:25,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760815614] [2024-06-21 20:14:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760815614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:25,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:25,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609329734] [2024-06-21 20:14:25,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:25,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:25,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 431 transitions, 7052 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:25,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:25,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:25,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:27,562 INFO L124 PetriNetUnfolderBase]: 9578/14166 cut-off events. [2024-06-21 20:14:27,563 INFO L125 PetriNetUnfolderBase]: For 831147/831175 co-relation queries the response was YES. [2024-06-21 20:14:27,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117589 conditions, 14166 events. 9578/14166 cut-off events. For 831147/831175 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88295 event pairs, 2641 based on Foata normal form. 23/14171 useless extension candidates. Maximal degree in co-relation 117470. Up to 12372 conditions per place. [2024-06-21 20:14:27,755 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 300 selfloop transitions, 194 changer transitions 0/503 dead transitions. [2024-06-21 20:14:27,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 503 transitions, 9228 flow [2024-06-21 20:14:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:14:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:14:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 376 transitions. [2024-06-21 20:14:27,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902668759811617 [2024-06-21 20:14:27,756 INFO L175 Difference]: Start difference. First operand has 242 places, 431 transitions, 7052 flow. Second operand 13 states and 376 transitions. [2024-06-21 20:14:27,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 503 transitions, 9228 flow [2024-06-21 20:14:30,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 503 transitions, 9142 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 20:14:30,043 INFO L231 Difference]: Finished difference. Result has 254 places, 442 transitions, 7646 flow [2024-06-21 20:14:30,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7646, PETRI_PLACES=254, PETRI_TRANSITIONS=442} [2024-06-21 20:14:30,043 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 202 predicate places. [2024-06-21 20:14:30,043 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 442 transitions, 7646 flow [2024-06-21 20:14:30,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:30,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:30,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:30,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:14:30,044 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:30,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1872876384, now seen corresponding path program 2 times [2024-06-21 20:14:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:30,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873070563] [2024-06-21 20:14:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:30,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873070563] [2024-06-21 20:14:30,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873070563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:30,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:30,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152987853] [2024-06-21 20:14:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:30,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:30,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:30,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 442 transitions, 7646 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:30,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:30,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:30,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:32,624 INFO L124 PetriNetUnfolderBase]: 9570/14163 cut-off events. [2024-06-21 20:14:32,624 INFO L125 PetriNetUnfolderBase]: For 866700/866728 co-relation queries the response was YES. [2024-06-21 20:14:32,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119478 conditions, 14163 events. 9570/14163 cut-off events. For 866700/866728 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88402 event pairs, 2641 based on Foata normal form. 23/14168 useless extension candidates. Maximal degree in co-relation 119356. Up to 12366 conditions per place. [2024-06-21 20:14:32,817 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 299 selfloop transitions, 191 changer transitions 0/499 dead transitions. [2024-06-21 20:14:32,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 499 transitions, 9376 flow [2024-06-21 20:14:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:14:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:14:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 329 transitions. [2024-06-21 20:14:32,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2024-06-21 20:14:32,818 INFO L175 Difference]: Start difference. First operand has 254 places, 442 transitions, 7646 flow. Second operand 11 states and 329 transitions. [2024-06-21 20:14:32,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 499 transitions, 9376 flow [2024-06-21 20:14:35,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 499 transitions, 8889 flow, removed 107 selfloop flow, removed 8 redundant places. [2024-06-21 20:14:35,496 INFO L231 Difference]: Finished difference. Result has 257 places, 442 transitions, 7552 flow [2024-06-21 20:14:35,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7552, PETRI_PLACES=257, PETRI_TRANSITIONS=442} [2024-06-21 20:14:35,497 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-21 20:14:35,497 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 442 transitions, 7552 flow [2024-06-21 20:14:35,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:35,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:14:35,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:14:35,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:14:35,497 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:14:35,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:14:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2109144000, now seen corresponding path program 1 times [2024-06-21 20:14:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:14:35,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596197432] [2024-06-21 20:14:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:14:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:14:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:14:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:14:35,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:14:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596197432] [2024-06-21 20:14:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596197432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:14:35,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:14:35,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:14:35,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561943350] [2024-06-21 20:14:35,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:14:35,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:14:35,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:14:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:14:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:14:35,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 20:14:35,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 442 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:14:35,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:14:35,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 20:14:35,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:14:39,202 INFO L124 PetriNetUnfolderBase]: 13274/19870 cut-off events. [2024-06-21 20:14:39,202 INFO L125 PetriNetUnfolderBase]: For 1636237/1636265 co-relation queries the response was YES. [2024-06-21 20:14:39,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172030 conditions, 19870 events. 13274/19870 cut-off events. For 1636237/1636265 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 133108 event pairs, 3381 based on Foata normal form. 182/20033 useless extension candidates. Maximal degree in co-relation 171907. Up to 11378 conditions per place.