./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe000_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:52:28,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:52:28,507 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:52:28,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:52:28,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:52:28,537 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:52:28,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:52:28,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:52:28,539 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:52:28,542 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:52:28,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:52:28,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:52:28,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:52:28,545 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:52:28,545 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:52:28,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:52:28,545 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:52:28,545 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:52:28,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:52:28,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:52:28,546 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:52:28,546 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:52:28,547 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:52:28,547 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:52:28,547 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:52:28,547 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:52:28,547 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:52:28,548 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:52:28,548 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:52:28,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:52:28,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:52:28,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:52:28,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:28,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:52:28,550 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:52:28,550 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:52:28,550 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:52:28,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:52:28,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:52:28,551 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:52:28,551 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:52:28,551 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:52:28,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:52:28,551 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:52:28,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:52:28,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:52:28,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:52:28,879 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:52:28,879 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:52:28,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:52:29,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:52:30,062 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:52:30,063 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:52:30,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250662da5/99cb710051ff445fa6099afabc78c9ad/FLAG0aa1b6839 [2024-06-28 00:52:30,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250662da5/99cb710051ff445fa6099afabc78c9ad [2024-06-28 00:52:30,091 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:52:30,092 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:52:30,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 00:52:30,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:52:30,179 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:52:30,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:30,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:52:30,190 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:52:30,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:30" (1/2) ... [2024-06-28 00:52:30,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338a9105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:30, skipping insertion in model container [2024-06-28 00:52:30,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:30" (1/2) ... [2024-06-28 00:52:30,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54f8599a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:30, skipping insertion in model container [2024-06-28 00:52:30,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:30" (2/2) ... [2024-06-28 00:52:30,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338a9105 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30, skipping insertion in model container [2024-06-28 00:52:30,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:30" (2/2) ... [2024-06-28 00:52:30,194 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:52:30,236 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:52:30,237 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:52:30,237 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:52:30,237 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:52:30,237 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:52:30,238 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-28 00:52:30,292 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:52:30,452 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-28 00:52:30,573 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:30,579 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:52:30,609 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:52:30,686 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:30,722 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:52:30,723 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30 WrapperNode [2024-06-28 00:52:30,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:30,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:30,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:52:30,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:52:30,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,801 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-28 00:52:30,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:30,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:52:30,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:52:30,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:52:30,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,828 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 00:52:30,828 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,868 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:52:30,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:52:30,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:52:30,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:52:30,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (1/1) ... [2024-06-28 00:52:30,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:30,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:52:30,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:52:30,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:52:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:52:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:52:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:52:30,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:52:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:52:30,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:52:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:52:30,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:52:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:52:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:52:30,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:52:30,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:52:30,991 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:52:31,085 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:52:31,087 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:52:31,312 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:52:31,312 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:52:31,388 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:52:31,388 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:52:31,389 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:31 BoogieIcfgContainer [2024-06-28 00:52:31,389 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:52:31,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:52:31,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:52:31,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:52:31,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:52:30" (1/4) ... [2024-06-28 00:52:31,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68042d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:52:31, skipping insertion in model container [2024-06-28 00:52:31,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:30" (2/4) ... [2024-06-28 00:52:31,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68042d0d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:31, skipping insertion in model container [2024-06-28 00:52:31,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:30" (3/4) ... [2024-06-28 00:52:31,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68042d0d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:31, skipping insertion in model container [2024-06-28 00:52:31,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:31" (4/4) ... [2024-06-28 00:52:31,397 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:52:31,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:52:31,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:52:31,411 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:52:31,451 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:52:31,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:52:31,515 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-28 00:52:31,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:31,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-28 00:52:31,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:52:31,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-28 00:52:31,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:52:31,543 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;@37c916da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:52:31,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 00:52:31,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:52:31,547 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:52:31,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:31,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:31,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:52:31,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:31,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:31,552 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-28 00:52:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:31,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890749082] [2024-06-28 00:52:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:31,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:31,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:31,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890749082] [2024-06-28 00:52:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890749082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:31,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:31,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:52:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809630777] [2024-06-28 00:52:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:52:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:31,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:52:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:52:31,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:52:31,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:31,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:31,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:52:31,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:32,127 INFO L124 PetriNetUnfolderBase]: 759/1271 cut-off events. [2024-06-28 00:52:32,128 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 00:52:32,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1271 events. 759/1271 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6825 event pairs, 414 based on Foata normal form. 1/1250 useless extension candidates. Maximal degree in co-relation 2463. Up to 1147 conditions per place. [2024-06-28 00:52:32,143 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 31 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 00:52:32,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 187 flow [2024-06-28 00:52:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:52:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:52:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-28 00:52:32,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2024-06-28 00:52:32,155 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 98 transitions. [2024-06-28 00:52:32,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 187 flow [2024-06-28 00:52:32,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:32,163 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-28 00:52:32,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 00:52:32,169 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-28 00:52:32,170 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-28 00:52:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:32,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:32,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:32,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:52:32,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:32,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash -483895311, now seen corresponding path program 1 times [2024-06-28 00:52:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691872748] [2024-06-28 00:52:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:32,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691872748] [2024-06-28 00:52:32,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691872748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929026527] [2024-06-28 00:52:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:32,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:32,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:32,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:32,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:32,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:32,653 INFO L124 PetriNetUnfolderBase]: 1224/2160 cut-off events. [2024-06-28 00:52:32,653 INFO L125 PetriNetUnfolderBase]: For 305/315 co-relation queries the response was YES. [2024-06-28 00:52:32,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4578 conditions, 2160 events. 1224/2160 cut-off events. For 305/315 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12619 event pairs, 628 based on Foata normal form. 6/2142 useless extension candidates. Maximal degree in co-relation 4566. Up to 1784 conditions per place. [2024-06-28 00:52:32,667 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 46 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-28 00:52:32,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 286 flow [2024-06-28 00:52:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-28 00:52:32,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-28 00:52:32,669 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 125 transitions. [2024-06-28 00:52:32,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 286 flow [2024-06-28 00:52:32,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:32,671 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 166 flow [2024-06-28 00:52:32,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-28 00:52:32,672 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-28 00:52:32,672 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 166 flow [2024-06-28 00:52:32,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:32,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:32,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:32,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:52:32,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:32,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1946832050, now seen corresponding path program 1 times [2024-06-28 00:52:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:32,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329506909] [2024-06-28 00:52:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:32,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:32,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:32,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329506909] [2024-06-28 00:52:32,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329506909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:32,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:32,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659538416] [2024-06-28 00:52:32,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:32,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:32,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:32,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:32,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 166 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) [2024-06-28 00:52:32,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:32,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:32,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:33,005 INFO L124 PetriNetUnfolderBase]: 1215/1985 cut-off events. [2024-06-28 00:52:33,005 INFO L125 PetriNetUnfolderBase]: For 815/854 co-relation queries the response was YES. [2024-06-28 00:52:33,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4866 conditions, 1985 events. 1215/1985 cut-off events. For 815/854 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10867 event pairs, 298 based on Foata normal form. 19/1999 useless extension candidates. Maximal degree in co-relation 4851. Up to 1731 conditions per place. [2024-06-28 00:52:33,015 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 52 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-28 00:52:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 354 flow [2024-06-28 00:52:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:52:33,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6711111111111111 [2024-06-28 00:52:33,018 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 166 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:52:33,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 354 flow [2024-06-28 00:52:33,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 352 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:33,020 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 197 flow [2024-06-28 00:52:33,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-28 00:52:33,021 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 8 predicate places. [2024-06-28 00:52:33,021 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 197 flow [2024-06-28 00:52:33,021 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) [2024-06-28 00:52:33,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:33,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:52:33,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:33,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -576324553, now seen corresponding path program 1 times [2024-06-28 00:52:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:33,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615794473] [2024-06-28 00:52:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:33,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615794473] [2024-06-28 00:52:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615794473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:33,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:33,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:33,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816708297] [2024-06-28 00:52:33,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:33,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:33,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:33,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:33,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:33,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:33,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:33,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:33,334 INFO L124 PetriNetUnfolderBase]: 1490/2424 cut-off events. [2024-06-28 00:52:33,334 INFO L125 PetriNetUnfolderBase]: For 1693/1693 co-relation queries the response was YES. [2024-06-28 00:52:33,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 2424 events. 1490/2424 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13858 event pairs, 746 based on Foata normal form. 2/2412 useless extension candidates. Maximal degree in co-relation 6252. Up to 2172 conditions per place. [2024-06-28 00:52:33,346 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 51 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2024-06-28 00:52:33,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 370 flow [2024-06-28 00:52:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-28 00:52:33,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 00:52:33,350 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 197 flow. Second operand 4 states and 117 transitions. [2024-06-28 00:52:33,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 370 flow [2024-06-28 00:52:33,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 347 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:33,356 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 224 flow [2024-06-28 00:52:33,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-28 00:52:33,357 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 10 predicate places. [2024-06-28 00:52:33,357 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 224 flow [2024-06-28 00:52:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:33,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:33,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:52:33,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:33,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash 25433884, now seen corresponding path program 1 times [2024-06-28 00:52:33,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:33,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522528964] [2024-06-28 00:52:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:33,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:33,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522528964] [2024-06-28 00:52:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522528964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:33,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449802393] [2024-06-28 00:52:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:33,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:33,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:33,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:33,732 INFO L124 PetriNetUnfolderBase]: 1470/2396 cut-off events. [2024-06-28 00:52:33,732 INFO L125 PetriNetUnfolderBase]: For 2576/2638 co-relation queries the response was YES. [2024-06-28 00:52:33,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2396 events. 1470/2396 cut-off events. For 2576/2638 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13706 event pairs, 435 based on Foata normal form. 14/2383 useless extension candidates. Maximal degree in co-relation 6805. Up to 2030 conditions per place. [2024-06-28 00:52:33,745 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 56 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-28 00:52:33,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 482 flow [2024-06-28 00:52:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-28 00:52:33,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6844444444444444 [2024-06-28 00:52:33,746 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 224 flow. Second operand 5 states and 154 transitions. [2024-06-28 00:52:33,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 482 flow [2024-06-28 00:52:33,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 482 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:33,750 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 302 flow [2024-06-28 00:52:33,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-28 00:52:33,751 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2024-06-28 00:52:33,751 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 302 flow [2024-06-28 00:52:33,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:33,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:33,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:52:33,752 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:33,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 595151510, now seen corresponding path program 1 times [2024-06-28 00:52:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:33,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941788135] [2024-06-28 00:52:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:33,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:33,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941788135] [2024-06-28 00:52:33,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941788135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:33,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:33,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210066171] [2024-06-28 00:52:33,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:33,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:33,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:33,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:33,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:33,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:34,160 INFO L124 PetriNetUnfolderBase]: 1639/2669 cut-off events. [2024-06-28 00:52:34,161 INFO L125 PetriNetUnfolderBase]: For 3773/3779 co-relation queries the response was YES. [2024-06-28 00:52:34,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 2669 events. 1639/2669 cut-off events. For 3773/3779 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15591 event pairs, 424 based on Foata normal form. 10/2665 useless extension candidates. Maximal degree in co-relation 7981. Up to 2193 conditions per place. [2024-06-28 00:52:34,177 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 60 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-28 00:52:34,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 580 flow [2024-06-28 00:52:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 00:52:34,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-28 00:52:34,179 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 302 flow. Second operand 5 states and 149 transitions. [2024-06-28 00:52:34,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 580 flow [2024-06-28 00:52:34,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 563 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:34,185 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 415 flow [2024-06-28 00:52:34,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-28 00:52:34,186 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2024-06-28 00:52:34,186 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 415 flow [2024-06-28 00:52:34,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:34,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:34,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:52:34,187 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:34,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 595151324, now seen corresponding path program 2 times [2024-06-28 00:52:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659116805] [2024-06-28 00:52:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:34,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659116805] [2024-06-28 00:52:34,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659116805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:34,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:34,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:34,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760730007] [2024-06-28 00:52:34,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:34,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:34,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:34,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 415 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:34,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:34,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:34,582 INFO L124 PetriNetUnfolderBase]: 1576/2565 cut-off events. [2024-06-28 00:52:34,583 INFO L125 PetriNetUnfolderBase]: For 6887/6991 co-relation queries the response was YES. [2024-06-28 00:52:34,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9236 conditions, 2565 events. 1576/2565 cut-off events. For 6887/6991 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14828 event pairs, 425 based on Foata normal form. 18/2545 useless extension candidates. Maximal degree in co-relation 9210. Up to 2171 conditions per place. [2024-06-28 00:52:34,599 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 61 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-28 00:52:34,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 615 flow [2024-06-28 00:52:34,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-28 00:52:34,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-28 00:52:34,601 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 415 flow. Second operand 4 states and 125 transitions. [2024-06-28 00:52:34,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 615 flow [2024-06-28 00:52:34,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 91 transitions, 588 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:34,613 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 426 flow [2024-06-28 00:52:34,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-28 00:52:34,613 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2024-06-28 00:52:34,614 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 426 flow [2024-06-28 00:52:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:34,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:34,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:52:34,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:34,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash -714930956, now seen corresponding path program 2 times [2024-06-28 00:52:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:34,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691507868] [2024-06-28 00:52:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691507868] [2024-06-28 00:52:34,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691507868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:34,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:34,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:34,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291442773] [2024-06-28 00:52:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:34,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:34,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 426 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:34,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:34,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:34,950 INFO L124 PetriNetUnfolderBase]: 1626/2632 cut-off events. [2024-06-28 00:52:34,950 INFO L125 PetriNetUnfolderBase]: For 6670/6676 co-relation queries the response was YES. [2024-06-28 00:52:34,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9475 conditions, 2632 events. 1626/2632 cut-off events. For 6670/6676 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15163 event pairs, 487 based on Foata normal form. 6/2628 useless extension candidates. Maximal degree in co-relation 9447. Up to 2294 conditions per place. [2024-06-28 00:52:34,967 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 74 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-06-28 00:52:34,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 732 flow [2024-06-28 00:52:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-28 00:52:34,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:52:34,969 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 426 flow. Second operand 5 states and 145 transitions. [2024-06-28 00:52:34,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 732 flow [2024-06-28 00:52:34,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 700 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:34,978 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 536 flow [2024-06-28 00:52:34,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-28 00:52:34,979 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-28 00:52:34,979 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 536 flow [2024-06-28 00:52:34,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:34,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:34,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:34,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:52:34,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:34,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:34,980 INFO L85 PathProgramCache]: Analyzing trace with hash -714922028, now seen corresponding path program 1 times [2024-06-28 00:52:34,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:34,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395332011] [2024-06-28 00:52:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:35,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:35,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395332011] [2024-06-28 00:52:35,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395332011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:35,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:35,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:35,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610140575] [2024-06-28 00:52:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:35,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:35,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:35,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:35,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:35,347 INFO L124 PetriNetUnfolderBase]: 1618/2603 cut-off events. [2024-06-28 00:52:35,347 INFO L125 PetriNetUnfolderBase]: For 8166/8169 co-relation queries the response was YES. [2024-06-28 00:52:35,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 2603 events. 1618/2603 cut-off events. For 8166/8169 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14918 event pairs, 441 based on Foata normal form. 6/2602 useless extension candidates. Maximal degree in co-relation 9939. Up to 2321 conditions per place. [2024-06-28 00:52:35,361 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 84 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2024-06-28 00:52:35,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 795 flow [2024-06-28 00:52:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-28 00:52:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-06-28 00:52:35,363 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 536 flow. Second operand 5 states and 143 transitions. [2024-06-28 00:52:35,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 795 flow [2024-06-28 00:52:35,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 779 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:35,370 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 565 flow [2024-06-28 00:52:35,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=565, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-28 00:52:35,371 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-06-28 00:52:35,371 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 565 flow [2024-06-28 00:52:35,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:35,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:35,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:52:35,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:35,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 788451806, now seen corresponding path program 1 times [2024-06-28 00:52:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:35,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378597642] [2024-06-28 00:52:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:35,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:35,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:35,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378597642] [2024-06-28 00:52:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378597642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:35,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:35,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:35,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591568294] [2024-06-28 00:52:35,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:35,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:35,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:35,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:35,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:35,888 INFO L124 PetriNetUnfolderBase]: 1765/2877 cut-off events. [2024-06-28 00:52:35,888 INFO L125 PetriNetUnfolderBase]: For 10578/10587 co-relation queries the response was YES. [2024-06-28 00:52:35,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11243 conditions, 2877 events. 1765/2877 cut-off events. For 10578/10587 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16966 event pairs, 406 based on Foata normal form. 10/2873 useless extension candidates. Maximal degree in co-relation 11209. Up to 2154 conditions per place. [2024-06-28 00:52:35,904 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 92 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-28 00:52:35,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 152 transitions, 1185 flow [2024-06-28 00:52:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:52:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:52:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-28 00:52:35,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6617283950617284 [2024-06-28 00:52:35,906 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 565 flow. Second operand 9 states and 268 transitions. [2024-06-28 00:52:35,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 152 transitions, 1185 flow [2024-06-28 00:52:35,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1158 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:35,918 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 777 flow [2024-06-28 00:52:35,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=777, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-28 00:52:35,919 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-06-28 00:52:35,919 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 777 flow [2024-06-28 00:52:35,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:35,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:35,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:35,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:52:35,920 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:35,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1269828842, now seen corresponding path program 2 times [2024-06-28 00:52:35,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:35,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187393056] [2024-06-28 00:52:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:36,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187393056] [2024-06-28 00:52:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187393056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:36,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561419500] [2024-06-28 00:52:36,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:36,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:36,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 777 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:36,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:36,455 INFO L124 PetriNetUnfolderBase]: 1898/3098 cut-off events. [2024-06-28 00:52:36,456 INFO L125 PetriNetUnfolderBase]: For 15344/15353 co-relation queries the response was YES. [2024-06-28 00:52:36,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13714 conditions, 3098 events. 1898/3098 cut-off events. For 15344/15353 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18480 event pairs, 459 based on Foata normal form. 10/3096 useless extension candidates. Maximal degree in co-relation 13677. Up to 2397 conditions per place. [2024-06-28 00:52:36,473 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 104 selfloop transitions, 46 changer transitions 0/163 dead transitions. [2024-06-28 00:52:36,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 163 transitions, 1492 flow [2024-06-28 00:52:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:52:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:52:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-28 00:52:36,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6694444444444444 [2024-06-28 00:52:36,474 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 777 flow. Second operand 8 states and 241 transitions. [2024-06-28 00:52:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 163 transitions, 1492 flow [2024-06-28 00:52:36,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 163 transitions, 1374 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:36,496 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 999 flow [2024-06-28 00:52:36,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=999, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-28 00:52:36,497 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-06-28 00:52:36,497 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 999 flow [2024-06-28 00:52:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:36,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:36,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:52:36,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:36,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1269823262, now seen corresponding path program 3 times [2024-06-28 00:52:36,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:36,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154412198] [2024-06-28 00:52:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:36,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:36,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154412198] [2024-06-28 00:52:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154412198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:36,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:36,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469083026] [2024-06-28 00:52:36,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:36,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:36,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:36,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:36,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:36,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:36,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:36,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:36,995 INFO L124 PetriNetUnfolderBase]: 1889/3085 cut-off events. [2024-06-28 00:52:36,996 INFO L125 PetriNetUnfolderBase]: For 17558/17573 co-relation queries the response was YES. [2024-06-28 00:52:37,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14301 conditions, 3085 events. 1889/3085 cut-off events. For 17558/17573 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18450 event pairs, 459 based on Foata normal form. 14/3080 useless extension candidates. Maximal degree in co-relation 14261. Up to 2390 conditions per place. [2024-06-28 00:52:37,017 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 96 selfloop transitions, 43 changer transitions 0/152 dead transitions. [2024-06-28 00:52:37,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 1434 flow [2024-06-28 00:52:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 00:52:37,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-28 00:52:37,019 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 999 flow. Second operand 6 states and 187 transitions. [2024-06-28 00:52:37,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 1434 flow [2024-06-28 00:52:37,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1345 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:37,058 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 1007 flow [2024-06-28 00:52:37,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-28 00:52:37,059 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2024-06-28 00:52:37,059 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 1007 flow [2024-06-28 00:52:37,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:37,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:37,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:37,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:52:37,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:37,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:37,061 INFO L85 PathProgramCache]: Analyzing trace with hash -688021940, now seen corresponding path program 4 times [2024-06-28 00:52:37,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:37,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199639010] [2024-06-28 00:52:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:37,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:37,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199639010] [2024-06-28 00:52:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199639010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:37,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:37,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711140638] [2024-06-28 00:52:37,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:37,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:37,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:37,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:37,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:37,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:37,570 INFO L124 PetriNetUnfolderBase]: 1884/3070 cut-off events. [2024-06-28 00:52:37,570 INFO L125 PetriNetUnfolderBase]: For 18636/18651 co-relation queries the response was YES. [2024-06-28 00:52:37,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14539 conditions, 3070 events. 1884/3070 cut-off events. For 18636/18651 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18214 event pairs, 458 based on Foata normal form. 12/3074 useless extension candidates. Maximal degree in co-relation 14497. Up to 2576 conditions per place. [2024-06-28 00:52:37,607 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 127 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2024-06-28 00:52:37,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1556 flow [2024-06-28 00:52:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:52:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:52:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 00:52:37,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-28 00:52:37,609 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 1007 flow. Second operand 8 states and 227 transitions. [2024-06-28 00:52:37,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1556 flow [2024-06-28 00:52:37,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 170 transitions, 1454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:52:37,646 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 1140 flow [2024-06-28 00:52:37,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1140, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2024-06-28 00:52:37,647 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-28 00:52:37,647 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 1140 flow [2024-06-28 00:52:37,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:37,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:37,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:37,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:52:37,648 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:37,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -337261788, now seen corresponding path program 1 times [2024-06-28 00:52:37,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:37,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468676132] [2024-06-28 00:52:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:37,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:37,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468676132] [2024-06-28 00:52:37,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468676132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:37,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:37,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447195051] [2024-06-28 00:52:37,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:37,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:37,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:37,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 1140 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) [2024-06-28 00:52:37,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:37,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:37,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:38,081 INFO L124 PetriNetUnfolderBase]: 1756/2876 cut-off events. [2024-06-28 00:52:38,081 INFO L125 PetriNetUnfolderBase]: For 20621/20637 co-relation queries the response was YES. [2024-06-28 00:52:38,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14081 conditions, 2876 events. 1756/2876 cut-off events. For 20621/20637 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17222 event pairs, 417 based on Foata normal form. 20/2871 useless extension candidates. Maximal degree in co-relation 14036. Up to 2373 conditions per place. [2024-06-28 00:52:38,102 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 99 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-28 00:52:38,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1442 flow [2024-06-28 00:52:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-28 00:52:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-06-28 00:52:38,104 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 1140 flow. Second operand 5 states and 149 transitions. [2024-06-28 00:52:38,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1442 flow [2024-06-28 00:52:38,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1359 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:38,133 INFO L231 Difference]: Finished difference. Result has 103 places, 127 transitions, 1119 flow [2024-06-28 00:52:38,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1119, PETRI_PLACES=103, PETRI_TRANSITIONS=127} [2024-06-28 00:52:38,135 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-06-28 00:52:38,135 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 127 transitions, 1119 flow [2024-06-28 00:52:38,135 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) [2024-06-28 00:52:38,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:38,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:52:38,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:38,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1509517467, now seen corresponding path program 1 times [2024-06-28 00:52:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:38,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261696305] [2024-06-28 00:52:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:38,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:38,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261696305] [2024-06-28 00:52:38,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261696305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:38,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:38,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429518954] [2024-06-28 00:52:38,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:38,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:38,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:38,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:38,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 127 transitions, 1119 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:38,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:38,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:38,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:38,593 INFO L124 PetriNetUnfolderBase]: 1810/2952 cut-off events. [2024-06-28 00:52:38,593 INFO L125 PetriNetUnfolderBase]: For 24235/24334 co-relation queries the response was YES. [2024-06-28 00:52:38,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14773 conditions, 2952 events. 1810/2952 cut-off events. For 24235/24334 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17642 event pairs, 257 based on Foata normal form. 60/2930 useless extension candidates. Maximal degree in co-relation 14727. Up to 2287 conditions per place. [2024-06-28 00:52:38,616 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 111 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-28 00:52:38,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 166 transitions, 1601 flow [2024-06-28 00:52:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:52:38,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 00:52:38,618 INFO L175 Difference]: Start difference. First operand has 103 places, 127 transitions, 1119 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:52:38,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 166 transitions, 1601 flow [2024-06-28 00:52:38,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 166 transitions, 1549 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:38,654 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1194 flow [2024-06-28 00:52:38,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1194, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-28 00:52:38,656 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 56 predicate places. [2024-06-28 00:52:38,656 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1194 flow [2024-06-28 00:52:38,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:38,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:38,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:38,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:52:38,657 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:38,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1512374427, now seen corresponding path program 2 times [2024-06-28 00:52:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:38,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18485914] [2024-06-28 00:52:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:38,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18485914] [2024-06-28 00:52:38,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18485914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:38,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:38,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996833027] [2024-06-28 00:52:38,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:38,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:38,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:38,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:38,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:38,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:38,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:38,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:39,147 INFO L124 PetriNetUnfolderBase]: 1826/2974 cut-off events. [2024-06-28 00:52:39,147 INFO L125 PetriNetUnfolderBase]: For 27531/27649 co-relation queries the response was YES. [2024-06-28 00:52:39,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15282 conditions, 2974 events. 1826/2974 cut-off events. For 27531/27649 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17789 event pairs, 369 based on Foata normal form. 52/2932 useless extension candidates. Maximal degree in co-relation 15235. Up to 2423 conditions per place. [2024-06-28 00:52:39,171 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 111 selfloop transitions, 29 changer transitions 0/165 dead transitions. [2024-06-28 00:52:39,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1590 flow [2024-06-28 00:52:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:52:39,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 00:52:39,173 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1194 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:52:39,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1590 flow [2024-06-28 00:52:39,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1524 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 00:52:39,212 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1229 flow [2024-06-28 00:52:39,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1229, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-28 00:52:39,213 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 60 predicate places. [2024-06-28 00:52:39,213 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1229 flow [2024-06-28 00:52:39,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:39,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:39,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:52:39,214 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:39,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:39,214 INFO L85 PathProgramCache]: Analyzing trace with hash 709811931, now seen corresponding path program 3 times [2024-06-28 00:52:39,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:39,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755225288] [2024-06-28 00:52:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:39,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755225288] [2024-06-28 00:52:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755225288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:39,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:39,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:39,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516720560] [2024-06-28 00:52:39,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:39,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:39,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:39,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:39,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1229 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:39,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:39,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:39,694 INFO L124 PetriNetUnfolderBase]: 1813/2959 cut-off events. [2024-06-28 00:52:39,694 INFO L125 PetriNetUnfolderBase]: For 27903/28032 co-relation queries the response was YES. [2024-06-28 00:52:39,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15163 conditions, 2959 events. 1813/2959 cut-off events. For 27903/28032 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17669 event pairs, 253 based on Foata normal form. 65/2935 useless extension candidates. Maximal degree in co-relation 15114. Up to 2373 conditions per place. [2024-06-28 00:52:39,716 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 106 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-06-28 00:52:39,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 1567 flow [2024-06-28 00:52:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:52:39,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-28 00:52:39,718 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1229 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:52:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 1567 flow [2024-06-28 00:52:39,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1498 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:39,757 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1230 flow [2024-06-28 00:52:39,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1230, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2024-06-28 00:52:39,757 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 61 predicate places. [2024-06-28 00:52:39,758 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1230 flow [2024-06-28 00:52:39,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:39,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:52:39,758 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:39,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash 709996629, now seen corresponding path program 1 times [2024-06-28 00:52:39,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444799844] [2024-06-28 00:52:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:39,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:39,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444799844] [2024-06-28 00:52:39,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444799844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:39,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:39,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:39,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351760362] [2024-06-28 00:52:39,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:39,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:39,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:39,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1230 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:39,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:39,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:39,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:40,275 INFO L124 PetriNetUnfolderBase]: 2128/3438 cut-off events. [2024-06-28 00:52:40,276 INFO L125 PetriNetUnfolderBase]: For 32423/32441 co-relation queries the response was YES. [2024-06-28 00:52:40,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17031 conditions, 3438 events. 2128/3438 cut-off events. For 32423/32441 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20778 event pairs, 412 based on Foata normal form. 36/3457 useless extension candidates. Maximal degree in co-relation 16981. Up to 2681 conditions per place. [2024-06-28 00:52:40,301 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 122 selfloop transitions, 32 changer transitions 0/167 dead transitions. [2024-06-28 00:52:40,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 167 transitions, 1688 flow [2024-06-28 00:52:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:52:40,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 00:52:40,302 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1230 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:52:40,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 167 transitions, 1688 flow [2024-06-28 00:52:40,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 167 transitions, 1625 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:40,351 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1307 flow [2024-06-28 00:52:40,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-28 00:52:40,352 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-28 00:52:40,352 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1307 flow [2024-06-28 00:52:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:40,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:40,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:52:40,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:40,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 554154173, now seen corresponding path program 2 times [2024-06-28 00:52:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:40,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859455273] [2024-06-28 00:52:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:40,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859455273] [2024-06-28 00:52:40,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859455273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038814088] [2024-06-28 00:52:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:40,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:40,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:40,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1307 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:40,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:40,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:40,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:40,862 INFO L124 PetriNetUnfolderBase]: 2155/3535 cut-off events. [2024-06-28 00:52:40,863 INFO L125 PetriNetUnfolderBase]: For 33180/33198 co-relation queries the response was YES. [2024-06-28 00:52:40,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18029 conditions, 3535 events. 2155/3535 cut-off events. For 33180/33198 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21740 event pairs, 773 based on Foata normal form. 16/3508 useless extension candidates. Maximal degree in co-relation 17978. Up to 3029 conditions per place. [2024-06-28 00:52:40,886 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 137 selfloop transitions, 18 changer transitions 0/168 dead transitions. [2024-06-28 00:52:40,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 168 transitions, 1718 flow [2024-06-28 00:52:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:52:40,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:52:40,887 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1307 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:52:40,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 168 transitions, 1718 flow [2024-06-28 00:52:40,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 168 transitions, 1618 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:40,953 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1284 flow [2024-06-28 00:52:40,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1284, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-06-28 00:52:40,953 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2024-06-28 00:52:40,954 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1284 flow [2024-06-28 00:52:40,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:40,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:40,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:40,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:52:40,956 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:40,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 554393183, now seen corresponding path program 3 times [2024-06-28 00:52:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:40,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633776617] [2024-06-28 00:52:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633776617] [2024-06-28 00:52:41,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633776617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:41,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:41,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:52:41,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973470774] [2024-06-28 00:52:41,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:41,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:52:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:41,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:52:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:52:41,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:41,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1284 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:41,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:41,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:41,465 INFO L124 PetriNetUnfolderBase]: 2147/3515 cut-off events. [2024-06-28 00:52:41,465 INFO L125 PetriNetUnfolderBase]: For 32007/32025 co-relation queries the response was YES. [2024-06-28 00:52:41,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17384 conditions, 3515 events. 2147/3515 cut-off events. For 32007/32025 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21563 event pairs, 708 based on Foata normal form. 16/3488 useless extension candidates. Maximal degree in co-relation 17332. Up to 2932 conditions per place. [2024-06-28 00:52:41,490 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 136 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2024-06-28 00:52:41,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1715 flow [2024-06-28 00:52:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:52:41,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:52:41,491 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1284 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:52:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1715 flow [2024-06-28 00:52:41,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 1658 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:52:41,539 INFO L231 Difference]: Finished difference. Result has 117 places, 142 transitions, 1335 flow [2024-06-28 00:52:41,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1335, PETRI_PLACES=117, PETRI_TRANSITIONS=142} [2024-06-28 00:52:41,539 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2024-06-28 00:52:41,539 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 142 transitions, 1335 flow [2024-06-28 00:52:41,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:41,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:41,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:52:41,540 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:41,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:41,541 INFO L85 PathProgramCache]: Analyzing trace with hash -449597377, now seen corresponding path program 1 times [2024-06-28 00:52:41,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:41,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681537310] [2024-06-28 00:52:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:41,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:41,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681537310] [2024-06-28 00:52:41,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681537310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:41,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:41,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:41,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600510501] [2024-06-28 00:52:41,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:41,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:41,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:41,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:41,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 142 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:41,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:41,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:41,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:42,393 INFO L124 PetriNetUnfolderBase]: 3340/5481 cut-off events. [2024-06-28 00:52:42,393 INFO L125 PetriNetUnfolderBase]: For 66533/66551 co-relation queries the response was YES. [2024-06-28 00:52:42,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26948 conditions, 5481 events. 3340/5481 cut-off events. For 66533/66551 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 37278 event pairs, 537 based on Foata normal form. 54/5518 useless extension candidates. Maximal degree in co-relation 26894. Up to 2325 conditions per place. [2024-06-28 00:52:42,444 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 149 selfloop transitions, 71 changer transitions 0/233 dead transitions. [2024-06-28 00:52:42,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 233 transitions, 2430 flow [2024-06-28 00:52:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:52:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:52:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 285 transitions. [2024-06-28 00:52:42,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-06-28 00:52:42,446 INFO L175 Difference]: Start difference. First operand has 117 places, 142 transitions, 1335 flow. Second operand 9 states and 285 transitions. [2024-06-28 00:52:42,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 233 transitions, 2430 flow [2024-06-28 00:52:42,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 233 transitions, 2362 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:42,560 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1614 flow [2024-06-28 00:52:42,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1614, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-28 00:52:42,561 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 76 predicate places. [2024-06-28 00:52:42,561 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1614 flow [2024-06-28 00:52:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:42,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:52:42,562 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:42,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash -360883747, now seen corresponding path program 2 times [2024-06-28 00:52:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312015957] [2024-06-28 00:52:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:42,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:42,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:42,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312015957] [2024-06-28 00:52:42,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312015957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:42,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:42,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247610537] [2024-06-28 00:52:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:42,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:42,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:42,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:42,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:42,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:42,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:43,421 INFO L124 PetriNetUnfolderBase]: 3701/6078 cut-off events. [2024-06-28 00:52:43,421 INFO L125 PetriNetUnfolderBase]: For 82117/82135 co-relation queries the response was YES. [2024-06-28 00:52:43,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30736 conditions, 6078 events. 3701/6078 cut-off events. For 82117/82135 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42188 event pairs, 1079 based on Foata normal form. 62/6119 useless extension candidates. Maximal degree in co-relation 30679. Up to 4549 conditions per place. [2024-06-28 00:52:43,463 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 131 selfloop transitions, 72 changer transitions 0/216 dead transitions. [2024-06-28 00:52:43,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 2363 flow [2024-06-28 00:52:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:52:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:52:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2024-06-28 00:52:43,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-28 00:52:43,465 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1614 flow. Second operand 10 states and 297 transitions. [2024-06-28 00:52:43,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 2363 flow [2024-06-28 00:52:43,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 216 transitions, 2217 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:43,630 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1672 flow [2024-06-28 00:52:43,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1672, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2024-06-28 00:52:43,631 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 83 predicate places. [2024-06-28 00:52:43,631 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1672 flow [2024-06-28 00:52:43,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:43,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:43,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:52:43,631 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:43,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -361031617, now seen corresponding path program 3 times [2024-06-28 00:52:43,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216562481] [2024-06-28 00:52:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:43,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:43,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216562481] [2024-06-28 00:52:43,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216562481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:43,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:43,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414812059] [2024-06-28 00:52:43,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:43,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:43,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:43,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:43,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:43,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:43,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:43,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:44,604 INFO L124 PetriNetUnfolderBase]: 4307/7100 cut-off events. [2024-06-28 00:52:44,605 INFO L125 PetriNetUnfolderBase]: For 94023/94041 co-relation queries the response was YES. [2024-06-28 00:52:44,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35210 conditions, 7100 events. 4307/7100 cut-off events. For 94023/94041 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51074 event pairs, 1210 based on Foata normal form. 54/7137 useless extension candidates. Maximal degree in co-relation 35151. Up to 4446 conditions per place. [2024-06-28 00:52:44,654 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 145 selfloop transitions, 74 changer transitions 0/232 dead transitions. [2024-06-28 00:52:44,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 232 transitions, 2596 flow [2024-06-28 00:52:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:52:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:52:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 307 transitions. [2024-06-28 00:52:44,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6822222222222222 [2024-06-28 00:52:44,656 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1672 flow. Second operand 10 states and 307 transitions. [2024-06-28 00:52:44,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 232 transitions, 2596 flow [2024-06-28 00:52:44,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 232 transitions, 2427 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 00:52:44,789 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1768 flow [2024-06-28 00:52:44,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1768, PETRI_PLACES=135, PETRI_TRANSITIONS=158} [2024-06-28 00:52:44,790 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2024-06-28 00:52:44,790 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1768 flow [2024-06-28 00:52:44,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:44,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:44,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:44,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:52:44,791 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:44,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash 534845033, now seen corresponding path program 4 times [2024-06-28 00:52:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:44,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611515584] [2024-06-28 00:52:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:44,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:44,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611515584] [2024-06-28 00:52:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611515584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:44,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393957431] [2024-06-28 00:52:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:44,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:44,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:44,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 158 transitions, 1768 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:44,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:44,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:44,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:45,793 INFO L124 PetriNetUnfolderBase]: 4643/7651 cut-off events. [2024-06-28 00:52:45,793 INFO L125 PetriNetUnfolderBase]: For 107573/107591 co-relation queries the response was YES. [2024-06-28 00:52:45,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37939 conditions, 7651 events. 4643/7651 cut-off events. For 107573/107591 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 55814 event pairs, 1494 based on Foata normal form. 62/7701 useless extension candidates. Maximal degree in co-relation 37878. Up to 6227 conditions per place. [2024-06-28 00:52:45,842 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 147 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-28 00:52:45,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2456 flow [2024-06-28 00:52:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:52:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:52:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-28 00:52:45,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6641975308641975 [2024-06-28 00:52:45,844 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1768 flow. Second operand 9 states and 269 transitions. [2024-06-28 00:52:45,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2456 flow [2024-06-28 00:52:46,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 216 transitions, 2316 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:52:46,043 INFO L231 Difference]: Finished difference. Result has 138 places, 160 transitions, 1808 flow [2024-06-28 00:52:46,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1808, PETRI_PLACES=138, PETRI_TRANSITIONS=160} [2024-06-28 00:52:46,044 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-28 00:52:46,044 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 160 transitions, 1808 flow [2024-06-28 00:52:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:46,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:46,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:46,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:52:46,044 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:46,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:46,045 INFO L85 PathProgramCache]: Analyzing trace with hash 529482653, now seen corresponding path program 5 times [2024-06-28 00:52:46,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:46,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586285991] [2024-06-28 00:52:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:46,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:46,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586285991] [2024-06-28 00:52:46,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586285991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:46,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088502856] [2024-06-28 00:52:46,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:46,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:46,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:46,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:46,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 160 transitions, 1808 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:46,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:46,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:46,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:47,116 INFO L124 PetriNetUnfolderBase]: 4969/8191 cut-off events. [2024-06-28 00:52:47,117 INFO L125 PetriNetUnfolderBase]: For 116279/116297 co-relation queries the response was YES. [2024-06-28 00:52:47,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40381 conditions, 8191 events. 4969/8191 cut-off events. For 116279/116297 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 60682 event pairs, 1611 based on Foata normal form. 62/8234 useless extension candidates. Maximal degree in co-relation 40318. Up to 6699 conditions per place. [2024-06-28 00:52:47,184 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 143 selfloop transitions, 53 changer transitions 0/209 dead transitions. [2024-06-28 00:52:47,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2464 flow [2024-06-28 00:52:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-28 00:52:47,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 00:52:47,185 INFO L175 Difference]: Start difference. First operand has 138 places, 160 transitions, 1808 flow. Second operand 7 states and 217 transitions. [2024-06-28 00:52:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2464 flow [2024-06-28 00:52:47,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2321 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 00:52:47,399 INFO L231 Difference]: Finished difference. Result has 138 places, 162 transitions, 1839 flow [2024-06-28 00:52:47,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=138, PETRI_TRANSITIONS=162} [2024-06-28 00:52:47,400 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 89 predicate places. [2024-06-28 00:52:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 162 transitions, 1839 flow [2024-06-28 00:52:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:47,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:47,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:47,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:52:47,401 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:47,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 529334783, now seen corresponding path program 6 times [2024-06-28 00:52:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:47,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871845330] [2024-06-28 00:52:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:47,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871845330] [2024-06-28 00:52:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871845330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:47,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:47,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:47,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020570126] [2024-06-28 00:52:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:47,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:47,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:47,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:47,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 162 transitions, 1839 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:47,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:47,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:47,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:48,669 INFO L124 PetriNetUnfolderBase]: 5606/9202 cut-off events. [2024-06-28 00:52:48,669 INFO L125 PetriNetUnfolderBase]: For 133190/133208 co-relation queries the response was YES. [2024-06-28 00:52:48,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44795 conditions, 9202 events. 5606/9202 cut-off events. For 133190/133208 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 69654 event pairs, 1601 based on Foata normal form. 54/9235 useless extension candidates. Maximal degree in co-relation 44731. Up to 5947 conditions per place. [2024-06-28 00:52:48,754 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 155 selfloop transitions, 56 changer transitions 0/224 dead transitions. [2024-06-28 00:52:48,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 2678 flow [2024-06-28 00:52:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:52:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:52:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 00:52:48,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-28 00:52:48,755 INFO L175 Difference]: Start difference. First operand has 138 places, 162 transitions, 1839 flow. Second operand 7 states and 223 transitions. [2024-06-28 00:52:48,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 2678 flow [2024-06-28 00:52:49,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 224 transitions, 2539 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:52:49,047 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1957 flow [2024-06-28 00:52:49,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1957, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-28 00:52:49,048 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 92 predicate places. [2024-06-28 00:52:49,048 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1957 flow [2024-06-28 00:52:49,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:49,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:49,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:49,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:52:49,049 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:49,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 535060235, now seen corresponding path program 1 times [2024-06-28 00:52:49,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:49,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132524674] [2024-06-28 00:52:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:49,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132524674] [2024-06-28 00:52:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132524674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:49,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002817643] [2024-06-28 00:52:49,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:49,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:49,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1957 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:49,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:49,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:50,502 INFO L124 PetriNetUnfolderBase]: 5879/9703 cut-off events. [2024-06-28 00:52:50,502 INFO L125 PetriNetUnfolderBase]: For 144601/144619 co-relation queries the response was YES. [2024-06-28 00:52:50,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47134 conditions, 9703 events. 5879/9703 cut-off events. For 144601/144619 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 74751 event pairs, 1844 based on Foata normal form. 54/9743 useless extension candidates. Maximal degree in co-relation 47068. Up to 6966 conditions per place. [2024-06-28 00:52:50,576 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 152 selfloop transitions, 67 changer transitions 0/232 dead transitions. [2024-06-28 00:52:50,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 2720 flow [2024-06-28 00:52:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:52:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:52:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2024-06-28 00:52:50,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6765432098765433 [2024-06-28 00:52:50,578 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1957 flow. Second operand 9 states and 274 transitions. [2024-06-28 00:52:50,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 2720 flow [2024-06-28 00:52:50,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 232 transitions, 2537 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 00:52:50,958 INFO L231 Difference]: Finished difference. Result has 145 places, 170 transitions, 1976 flow [2024-06-28 00:52:50,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1976, PETRI_PLACES=145, PETRI_TRANSITIONS=170} [2024-06-28 00:52:50,959 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 96 predicate places. [2024-06-28 00:52:50,959 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 170 transitions, 1976 flow [2024-06-28 00:52:50,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:50,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:50,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:50,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:52:50,960 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:50,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807, now seen corresponding path program 7 times [2024-06-28 00:52:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930103518] [2024-06-28 00:52:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:51,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:51,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930103518] [2024-06-28 00:52:51,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930103518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:51,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:51,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:51,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196267108] [2024-06-28 00:52:51,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:51,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:51,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:51,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:51,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 170 transitions, 1976 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:51,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:51,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:51,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:52,180 INFO L124 PetriNetUnfolderBase]: 5938/9930 cut-off events. [2024-06-28 00:52:52,180 INFO L125 PetriNetUnfolderBase]: For 142746/142764 co-relation queries the response was YES. [2024-06-28 00:52:52,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47315 conditions, 9930 events. 5938/9930 cut-off events. For 142746/142764 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 77629 event pairs, 3225 based on Foata normal form. 28/9896 useless extension candidates. Maximal degree in co-relation 47249. Up to 8825 conditions per place. [2024-06-28 00:52:52,403 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 180 selfloop transitions, 31 changer transitions 0/224 dead transitions. [2024-06-28 00:52:52,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 224 transitions, 2569 flow [2024-06-28 00:52:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:52:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:52:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-28 00:52:52,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-28 00:52:52,413 INFO L175 Difference]: Start difference. First operand has 145 places, 170 transitions, 1976 flow. Second operand 9 states and 255 transitions. [2024-06-28 00:52:52,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 224 transitions, 2569 flow [2024-06-28 00:52:52,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 2391 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:52:52,741 INFO L231 Difference]: Finished difference. Result has 147 places, 171 transitions, 1895 flow [2024-06-28 00:52:52,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1895, PETRI_PLACES=147, PETRI_TRANSITIONS=171} [2024-06-28 00:52:52,742 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 98 predicate places. [2024-06-28 00:52:52,742 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 171 transitions, 1895 flow [2024-06-28 00:52:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:52,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:52,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:52,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:52:52,743 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:52,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1088605, now seen corresponding path program 2 times [2024-06-28 00:52:52,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:52,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829543347] [2024-06-28 00:52:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:52,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:52,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829543347] [2024-06-28 00:52:52,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829543347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:52,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:52,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:52,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840498175] [2024-06-28 00:52:52,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:52,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:52,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:52,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 171 transitions, 1895 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:52,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:52,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:52,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:54,081 INFO L124 PetriNetUnfolderBase]: 6005/10045 cut-off events. [2024-06-28 00:52:54,082 INFO L125 PetriNetUnfolderBase]: For 145409/145427 co-relation queries the response was YES. [2024-06-28 00:52:54,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47241 conditions, 10045 events. 6005/10045 cut-off events. For 145409/145427 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 78800 event pairs, 3223 based on Foata normal form. 24/10007 useless extension candidates. Maximal degree in co-relation 47174. Up to 8809 conditions per place. [2024-06-28 00:52:54,162 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 187 selfloop transitions, 34 changer transitions 0/234 dead transitions. [2024-06-28 00:52:54,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2538 flow [2024-06-28 00:52:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:52:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:52:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 283 transitions. [2024-06-28 00:52:54,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-06-28 00:52:54,164 INFO L175 Difference]: Start difference. First operand has 147 places, 171 transitions, 1895 flow. Second operand 10 states and 283 transitions. [2024-06-28 00:52:54,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2538 flow [2024-06-28 00:52:54,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 234 transitions, 2457 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 00:52:54,479 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1918 flow [2024-06-28 00:52:54,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1918, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-28 00:52:54,480 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-28 00:52:54,480 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1918 flow [2024-06-28 00:52:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:54,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:54,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:54,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:52:54,481 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:54,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash 6320705, now seen corresponding path program 3 times [2024-06-28 00:52:54,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:54,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754773757] [2024-06-28 00:52:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:54,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754773757] [2024-06-28 00:52:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754773757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:52:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201570508] [2024-06-28 00:52:54,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:54,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:52:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:52:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:52:54,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:54,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1918 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:54,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:54,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:54,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:55,803 INFO L124 PetriNetUnfolderBase]: 5985/9969 cut-off events. [2024-06-28 00:52:55,803 INFO L125 PetriNetUnfolderBase]: For 146374/146392 co-relation queries the response was YES. [2024-06-28 00:52:55,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46727 conditions, 9969 events. 5985/9969 cut-off events. For 146374/146392 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 77662 event pairs, 3098 based on Foata normal form. 24/9939 useless extension candidates. Maximal degree in co-relation 46659. Up to 8230 conditions per place. [2024-06-28 00:52:55,889 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 174 selfloop transitions, 41 changer transitions 0/228 dead transitions. [2024-06-28 00:52:55,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 228 transitions, 2453 flow [2024-06-28 00:52:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:52:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:52:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-28 00:52:55,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6345679012345679 [2024-06-28 00:52:55,891 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1918 flow. Second operand 9 states and 257 transitions. [2024-06-28 00:52:55,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 228 transitions, 2453 flow [2024-06-28 00:52:56,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 228 transitions, 2363 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 00:52:56,248 INFO L231 Difference]: Finished difference. Result has 150 places, 171 transitions, 1858 flow [2024-06-28 00:52:56,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1858, PETRI_PLACES=150, PETRI_TRANSITIONS=171} [2024-06-28 00:52:56,249 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 101 predicate places. [2024-06-28 00:52:56,249 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 171 transitions, 1858 flow [2024-06-28 00:52:56,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:56,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:56,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:56,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:52:56,250 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:56,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1986008509, now seen corresponding path program 1 times [2024-06-28 00:52:56,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502318001] [2024-06-28 00:52:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:56,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:56,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:56,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502318001] [2024-06-28 00:52:56,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502318001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:56,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:56,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:56,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065961906] [2024-06-28 00:52:56,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:56,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:56,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:56,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:56,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 171 transitions, 1858 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) [2024-06-28 00:52:56,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:56,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:57,572 INFO L124 PetriNetUnfolderBase]: 5808/9640 cut-off events. [2024-06-28 00:52:57,572 INFO L125 PetriNetUnfolderBase]: For 147374/147414 co-relation queries the response was YES. [2024-06-28 00:52:57,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45892 conditions, 9640 events. 5808/9640 cut-off events. For 147374/147414 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 75367 event pairs, 1967 based on Foata normal form. 25/9617 useless extension candidates. Maximal degree in co-relation 45823. Up to 8676 conditions per place. [2024-06-28 00:52:57,671 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 143 selfloop transitions, 38 changer transitions 0/206 dead transitions. [2024-06-28 00:52:57,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 206 transitions, 2548 flow [2024-06-28 00:52:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:52:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:52:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:52:57,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:52:57,672 INFO L175 Difference]: Start difference. First operand has 150 places, 171 transitions, 1858 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:52:57,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 206 transitions, 2548 flow [2024-06-28 00:52:58,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 206 transitions, 2423 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 00:52:58,049 INFO L231 Difference]: Finished difference. Result has 149 places, 182 transitions, 1997 flow [2024-06-28 00:52:58,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1997, PETRI_PLACES=149, PETRI_TRANSITIONS=182} [2024-06-28 00:52:58,049 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 100 predicate places. [2024-06-28 00:52:58,050 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 182 transitions, 1997 flow [2024-06-28 00:52:58,050 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) [2024-06-28 00:52:58,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:58,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:58,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:52:58,065 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:58,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2131475913, now seen corresponding path program 1 times [2024-06-28 00:52:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:58,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308767113] [2024-06-28 00:52:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:58,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308767113] [2024-06-28 00:52:58,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308767113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:58,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:58,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323567891] [2024-06-28 00:52:58,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:58,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:58,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:58,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 182 transitions, 1997 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) [2024-06-28 00:52:58,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:58,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:58,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:59,388 INFO L124 PetriNetUnfolderBase]: 6029/10101 cut-off events. [2024-06-28 00:52:59,388 INFO L125 PetriNetUnfolderBase]: For 160603/160606 co-relation queries the response was YES. [2024-06-28 00:52:59,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48510 conditions, 10101 events. 6029/10101 cut-off events. For 160603/160606 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 79562 event pairs, 3273 based on Foata normal form. 3/10070 useless extension candidates. Maximal degree in co-relation 48441. Up to 9158 conditions per place. [2024-06-28 00:52:59,486 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 184 selfloop transitions, 21 changer transitions 0/218 dead transitions. [2024-06-28 00:52:59,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 218 transitions, 2726 flow [2024-06-28 00:52:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-28 00:52:59,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-28 00:52:59,487 INFO L175 Difference]: Start difference. First operand has 149 places, 182 transitions, 1997 flow. Second operand 5 states and 144 transitions. [2024-06-28 00:52:59,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 218 transitions, 2726 flow [2024-06-28 00:52:59,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 218 transitions, 2665 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:59,914 INFO L231 Difference]: Finished difference. Result has 155 places, 195 transitions, 2204 flow [2024-06-28 00:52:59,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2204, PETRI_PLACES=155, PETRI_TRANSITIONS=195} [2024-06-28 00:52:59,915 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 106 predicate places. [2024-06-28 00:52:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 195 transitions, 2204 flow [2024-06-28 00:52:59,915 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) [2024-06-28 00:52:59,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:59,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:52:59,916 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:59,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-28 00:52:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:59,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066706961] [2024-06-28 00:52:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:59,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:00,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:00,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066706961] [2024-06-28 00:53:00,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066706961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:00,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:00,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:00,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724936205] [2024-06-28 00:53:00,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:00,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:00,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:00,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:00,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:00,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:00,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 195 transitions, 2204 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) [2024-06-28 00:53:00,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:00,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:00,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:01,129 INFO L124 PetriNetUnfolderBase]: 5949/9920 cut-off events. [2024-06-28 00:53:01,129 INFO L125 PetriNetUnfolderBase]: For 183406/183446 co-relation queries the response was YES. [2024-06-28 00:53:01,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49883 conditions, 9920 events. 5949/9920 cut-off events. For 183406/183446 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 78048 event pairs, 1987 based on Foata normal form. 46/9915 useless extension candidates. Maximal degree in co-relation 49810. Up to 8764 conditions per place. [2024-06-28 00:53:01,232 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 163 selfloop transitions, 36 changer transitions 0/224 dead transitions. [2024-06-28 00:53:01,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 224 transitions, 2743 flow [2024-06-28 00:53:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:53:01,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 00:53:01,233 INFO L175 Difference]: Start difference. First operand has 155 places, 195 transitions, 2204 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:53:01,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 224 transitions, 2743 flow [2024-06-28 00:53:01,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 224 transitions, 2689 flow, removed 27 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:01,699 INFO L231 Difference]: Finished difference. Result has 161 places, 198 transitions, 2287 flow [2024-06-28 00:53:01,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2287, PETRI_PLACES=161, PETRI_TRANSITIONS=198} [2024-06-28 00:53:01,699 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 112 predicate places. [2024-06-28 00:53:01,699 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 198 transitions, 2287 flow [2024-06-28 00:53:01,700 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) [2024-06-28 00:53:01,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:01,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:01,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:53:01,700 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1948311287, now seen corresponding path program 1 times [2024-06-28 00:53:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:01,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129110273] [2024-06-28 00:53:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:01,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:01,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129110273] [2024-06-28 00:53:01,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129110273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:01,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:01,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683872627] [2024-06-28 00:53:01,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:01,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:01,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 2287 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:01,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:01,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:02,958 INFO L124 PetriNetUnfolderBase]: 6180/10290 cut-off events. [2024-06-28 00:53:02,968 INFO L125 PetriNetUnfolderBase]: For 182536/182551 co-relation queries the response was YES. [2024-06-28 00:53:03,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52106 conditions, 10290 events. 6180/10290 cut-off events. For 182536/182551 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 80566 event pairs, 3322 based on Foata normal form. 11/10255 useless extension candidates. Maximal degree in co-relation 52030. Up to 9405 conditions per place. [2024-06-28 00:53:03,069 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 200 selfloop transitions, 17 changer transitions 0/230 dead transitions. [2024-06-28 00:53:03,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2852 flow [2024-06-28 00:53:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 00:53:03,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-28 00:53:03,071 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 2287 flow. Second operand 6 states and 166 transitions. [2024-06-28 00:53:03,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2852 flow [2024-06-28 00:53:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 230 transitions, 2751 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:03,533 INFO L231 Difference]: Finished difference. Result has 164 places, 202 transitions, 2281 flow [2024-06-28 00:53:03,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=164, PETRI_TRANSITIONS=202} [2024-06-28 00:53:03,535 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 115 predicate places. [2024-06-28 00:53:03,535 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 202 transitions, 2281 flow [2024-06-28 00:53:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:03,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:53:03,535 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:03,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1925639747, now seen corresponding path program 2 times [2024-06-28 00:53:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99070787] [2024-06-28 00:53:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:03,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99070787] [2024-06-28 00:53:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99070787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:03,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:03,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219633514] [2024-06-28 00:53:03,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:03,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:03,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:03,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:03,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 202 transitions, 2281 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:03,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:03,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:04,832 INFO L124 PetriNetUnfolderBase]: 6191/10217 cut-off events. [2024-06-28 00:53:04,833 INFO L125 PetriNetUnfolderBase]: For 187611/187611 co-relation queries the response was YES. [2024-06-28 00:53:04,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51710 conditions, 10217 events. 6191/10217 cut-off events. For 187611/187611 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 79431 event pairs, 2053 based on Foata normal form. 1/10206 useless extension candidates. Maximal degree in co-relation 51632. Up to 9391 conditions per place. [2024-06-28 00:53:04,931 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 194 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-28 00:53:04,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 232 transitions, 2987 flow [2024-06-28 00:53:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-28 00:53:04,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:53:04,932 INFO L175 Difference]: Start difference. First operand has 164 places, 202 transitions, 2281 flow. Second operand 5 states and 140 transitions. [2024-06-28 00:53:04,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 232 transitions, 2987 flow [2024-06-28 00:53:05,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 232 transitions, 2943 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:05,407 INFO L231 Difference]: Finished difference. Result has 167 places, 212 transitions, 2453 flow [2024-06-28 00:53:05,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2453, PETRI_PLACES=167, PETRI_TRANSITIONS=212} [2024-06-28 00:53:05,408 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 118 predicate places. [2024-06-28 00:53:05,408 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 212 transitions, 2453 flow [2024-06-28 00:53:05,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:05,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:05,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:05,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:53:05,409 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:05,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:05,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1925650907, now seen corresponding path program 3 times [2024-06-28 00:53:05,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:05,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286060925] [2024-06-28 00:53:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:05,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286060925] [2024-06-28 00:53:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286060925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:05,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:05,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649769138] [2024-06-28 00:53:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:05,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:05,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 212 transitions, 2453 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:05,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:05,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:05,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:06,667 INFO L124 PetriNetUnfolderBase]: 6188/10324 cut-off events. [2024-06-28 00:53:06,668 INFO L125 PetriNetUnfolderBase]: For 195781/195796 co-relation queries the response was YES. [2024-06-28 00:53:06,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52199 conditions, 10324 events. 6188/10324 cut-off events. For 195781/195796 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 81054 event pairs, 3308 based on Foata normal form. 11/10288 useless extension candidates. Maximal degree in co-relation 52119. Up to 9388 conditions per place. [2024-06-28 00:53:06,772 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 203 selfloop transitions, 27 changer transitions 0/243 dead transitions. [2024-06-28 00:53:06,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 243 transitions, 3009 flow [2024-06-28 00:53:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-28 00:53:06,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-28 00:53:06,774 INFO L175 Difference]: Start difference. First operand has 167 places, 212 transitions, 2453 flow. Second operand 7 states and 190 transitions. [2024-06-28 00:53:06,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 243 transitions, 3009 flow [2024-06-28 00:53:07,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 243 transitions, 2980 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:07,329 INFO L231 Difference]: Finished difference. Result has 173 places, 212 transitions, 2488 flow [2024-06-28 00:53:07,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2488, PETRI_PLACES=173, PETRI_TRANSITIONS=212} [2024-06-28 00:53:07,330 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-28 00:53:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 212 transitions, 2488 flow [2024-06-28 00:53:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:07,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:07,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:53:07,331 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:07,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1907796413, now seen corresponding path program 4 times [2024-06-28 00:53:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:07,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885468638] [2024-06-28 00:53:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:07,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:07,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885468638] [2024-06-28 00:53:07,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885468638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:07,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317141074] [2024-06-28 00:53:07,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:07,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:07,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:07,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 212 transitions, 2488 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:07,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:07,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:07,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:08,580 INFO L124 PetriNetUnfolderBase]: 6185/10221 cut-off events. [2024-06-28 00:53:08,580 INFO L125 PetriNetUnfolderBase]: For 203024/203024 co-relation queries the response was YES. [2024-06-28 00:53:08,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52410 conditions, 10221 events. 6185/10221 cut-off events. For 203024/203024 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 79563 event pairs, 2057 based on Foata normal form. 1/10209 useless extension candidates. Maximal degree in co-relation 52328. Up to 9370 conditions per place. [2024-06-28 00:53:08,669 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 197 selfloop transitions, 30 changer transitions 0/240 dead transitions. [2024-06-28 00:53:08,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 240 transitions, 3070 flow [2024-06-28 00:53:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-28 00:53:08,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:53:08,670 INFO L175 Difference]: Start difference. First operand has 173 places, 212 transitions, 2488 flow. Second operand 6 states and 162 transitions. [2024-06-28 00:53:08,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 240 transitions, 3070 flow [2024-06-28 00:53:09,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 3014 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:09,216 INFO L231 Difference]: Finished difference. Result has 175 places, 218 transitions, 2566 flow [2024-06-28 00:53:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2566, PETRI_PLACES=175, PETRI_TRANSITIONS=218} [2024-06-28 00:53:09,217 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2024-06-28 00:53:09,217 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 218 transitions, 2566 flow [2024-06-28 00:53:09,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:53:09,217 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:09,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1651245001, now seen corresponding path program 1 times [2024-06-28 00:53:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100935595] [2024-06-28 00:53:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:09,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100935595] [2024-06-28 00:53:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100935595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:09,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:09,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:09,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988107157] [2024-06-28 00:53:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:09,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:09,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:09,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:09,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 218 transitions, 2566 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:09,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:09,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:09,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:10,511 INFO L124 PetriNetUnfolderBase]: 6182/10209 cut-off events. [2024-06-28 00:53:10,511 INFO L125 PetriNetUnfolderBase]: For 213600/213603 co-relation queries the response was YES. [2024-06-28 00:53:10,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53889 conditions, 10209 events. 6182/10209 cut-off events. For 213600/213603 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 79563 event pairs, 2051 based on Foata normal form. 3/10203 useless extension candidates. Maximal degree in co-relation 53805. Up to 9388 conditions per place. [2024-06-28 00:53:10,624 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 207 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-06-28 00:53:10,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 3133 flow [2024-06-28 00:53:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 00:53:10,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-28 00:53:10,625 INFO L175 Difference]: Start difference. First operand has 175 places, 218 transitions, 2566 flow. Second operand 6 states and 166 transitions. [2024-06-28 00:53:10,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 3133 flow [2024-06-28 00:53:11,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 244 transitions, 3037 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:11,135 INFO L231 Difference]: Finished difference. Result has 178 places, 219 transitions, 2543 flow [2024-06-28 00:53:11,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2543, PETRI_PLACES=178, PETRI_TRANSITIONS=219} [2024-06-28 00:53:11,136 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 129 predicate places. [2024-06-28 00:53:11,136 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 219 transitions, 2543 flow [2024-06-28 00:53:11,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:11,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:11,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:11,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:53:11,136 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:11,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1439639828, now seen corresponding path program 1 times [2024-06-28 00:53:11,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:11,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111123771] [2024-06-28 00:53:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:11,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:11,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111123771] [2024-06-28 00:53:11,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111123771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:11,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:11,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:11,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053265154] [2024-06-28 00:53:11,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:11,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:11,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:11,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 219 transitions, 2543 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:11,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:11,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:11,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:12,453 INFO L124 PetriNetUnfolderBase]: 6207/10266 cut-off events. [2024-06-28 00:53:12,453 INFO L125 PetriNetUnfolderBase]: For 225187/225205 co-relation queries the response was YES. [2024-06-28 00:53:12,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54376 conditions, 10266 events. 6207/10266 cut-off events. For 225187/225205 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 80119 event pairs, 2078 based on Foata normal form. 13/10263 useless extension candidates. Maximal degree in co-relation 54291. Up to 9290 conditions per place. [2024-06-28 00:53:12,545 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 185 selfloop transitions, 49 changer transitions 0/247 dead transitions. [2024-06-28 00:53:12,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 247 transitions, 3253 flow [2024-06-28 00:53:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:53:12,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:53:12,547 INFO L175 Difference]: Start difference. First operand has 178 places, 219 transitions, 2543 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:53:12,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 247 transitions, 3253 flow [2024-06-28 00:53:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 247 transitions, 3189 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:13,085 INFO L231 Difference]: Finished difference. Result has 181 places, 225 transitions, 2737 flow [2024-06-28 00:53:13,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2737, PETRI_PLACES=181, PETRI_TRANSITIONS=225} [2024-06-28 00:53:13,086 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 132 predicate places. [2024-06-28 00:53:13,086 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 225 transitions, 2737 flow [2024-06-28 00:53:13,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:13,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:13,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:53:13,087 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:13,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:13,087 INFO L85 PathProgramCache]: Analyzing trace with hash -492405720, now seen corresponding path program 2 times [2024-06-28 00:53:13,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101285601] [2024-06-28 00:53:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:13,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101285601] [2024-06-28 00:53:13,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101285601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:13,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:13,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357928338] [2024-06-28 00:53:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:13,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:13,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:13,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 225 transitions, 2737 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:13,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:13,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:13,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:14,389 INFO L124 PetriNetUnfolderBase]: 6232/10307 cut-off events. [2024-06-28 00:53:14,389 INFO L125 PetriNetUnfolderBase]: For 246251/246269 co-relation queries the response was YES. [2024-06-28 00:53:14,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56625 conditions, 10307 events. 6232/10307 cut-off events. For 246251/246269 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 80568 event pairs, 2115 based on Foata normal form. 13/10294 useless extension candidates. Maximal degree in co-relation 56538. Up to 9221 conditions per place. [2024-06-28 00:53:14,485 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 181 selfloop transitions, 70 changer transitions 0/264 dead transitions. [2024-06-28 00:53:14,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 264 transitions, 3778 flow [2024-06-28 00:53:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:53:14,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 00:53:14,491 INFO L175 Difference]: Start difference. First operand has 181 places, 225 transitions, 2737 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:53:14,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 264 transitions, 3778 flow [2024-06-28 00:53:15,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 264 transitions, 3671 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:15,167 INFO L231 Difference]: Finished difference. Result has 186 places, 237 transitions, 3082 flow [2024-06-28 00:53:15,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3082, PETRI_PLACES=186, PETRI_TRANSITIONS=237} [2024-06-28 00:53:15,168 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 137 predicate places. [2024-06-28 00:53:15,168 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 237 transitions, 3082 flow [2024-06-28 00:53:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:15,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:15,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:53:15,169 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:15,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash -480977880, now seen corresponding path program 3 times [2024-06-28 00:53:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:15,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944925142] [2024-06-28 00:53:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:15,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944925142] [2024-06-28 00:53:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944925142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:15,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:15,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:15,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811115497] [2024-06-28 00:53:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:15,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:15,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:15,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:15,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 237 transitions, 3082 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:15,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:15,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:15,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:16,524 INFO L124 PetriNetUnfolderBase]: 6229/10303 cut-off events. [2024-06-28 00:53:16,525 INFO L125 PetriNetUnfolderBase]: For 255544/255562 co-relation queries the response was YES. [2024-06-28 00:53:16,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58253 conditions, 10303 events. 6229/10303 cut-off events. For 255544/255562 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 80471 event pairs, 2115 based on Foata normal form. 13/10290 useless extension candidates. Maximal degree in co-relation 58163. Up to 9219 conditions per place. [2024-06-28 00:53:16,618 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 177 selfloop transitions, 70 changer transitions 0/260 dead transitions. [2024-06-28 00:53:16,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 260 transitions, 3780 flow [2024-06-28 00:53:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-28 00:53:16,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:53:16,620 INFO L175 Difference]: Start difference. First operand has 186 places, 237 transitions, 3082 flow. Second operand 6 states and 171 transitions. [2024-06-28 00:53:16,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 260 transitions, 3780 flow [2024-06-28 00:53:17,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 260 transitions, 3670 flow, removed 55 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:17,478 INFO L231 Difference]: Finished difference. Result has 192 places, 237 transitions, 3118 flow [2024-06-28 00:53:17,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3118, PETRI_PLACES=192, PETRI_TRANSITIONS=237} [2024-06-28 00:53:17,479 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-28 00:53:17,479 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 237 transitions, 3118 flow [2024-06-28 00:53:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:17,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:17,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:17,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:53:17,479 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:17,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash -534893720, now seen corresponding path program 4 times [2024-06-28 00:53:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:17,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520185582] [2024-06-28 00:53:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:17,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520185582] [2024-06-28 00:53:17,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520185582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:17,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:17,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:17,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867947759] [2024-06-28 00:53:17,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:17,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:17,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:17,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 237 transitions, 3118 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:17,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:17,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:18,838 INFO L124 PetriNetUnfolderBase]: 6223/10288 cut-off events. [2024-06-28 00:53:18,838 INFO L125 PetriNetUnfolderBase]: For 250075/250093 co-relation queries the response was YES. [2024-06-28 00:53:18,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56529 conditions, 10288 events. 6223/10288 cut-off events. For 250075/250093 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 80167 event pairs, 2077 based on Foata normal form. 14/10286 useless extension candidates. Maximal degree in co-relation 56436. Up to 9273 conditions per place. [2024-06-28 00:53:18,937 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 196 selfloop transitions, 54 changer transitions 0/263 dead transitions. [2024-06-28 00:53:18,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 263 transitions, 3834 flow [2024-06-28 00:53:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:53:18,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 00:53:18,938 INFO L175 Difference]: Start difference. First operand has 192 places, 237 transitions, 3118 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:53:18,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 263 transitions, 3834 flow [2024-06-28 00:53:19,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 263 transitions, 3579 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:19,662 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2982 flow [2024-06-28 00:53:19,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2982, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-28 00:53:19,665 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 144 predicate places. [2024-06-28 00:53:19,665 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2982 flow [2024-06-28 00:53:19,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:19,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:19,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:19,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:53:19,667 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:19,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 1 times [2024-06-28 00:53:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:19,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022856073] [2024-06-28 00:53:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:19,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:19,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:19,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022856073] [2024-06-28 00:53:19,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022856073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:19,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:19,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:19,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747390230] [2024-06-28 00:53:19,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:19,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:19,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:19,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:19,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2982 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:19,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:21,068 INFO L124 PetriNetUnfolderBase]: 6110/10131 cut-off events. [2024-06-28 00:53:21,068 INFO L125 PetriNetUnfolderBase]: For 265899/265941 co-relation queries the response was YES. [2024-06-28 00:53:21,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55982 conditions, 10131 events. 6110/10131 cut-off events. For 265899/265941 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 79550 event pairs, 2013 based on Foata normal form. 35/10117 useless extension candidates. Maximal degree in co-relation 55889. Up to 8994 conditions per place. [2024-06-28 00:53:21,164 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 184 selfloop transitions, 56 changer transitions 0/269 dead transitions. [2024-06-28 00:53:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 269 transitions, 3758 flow [2024-06-28 00:53:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:53:21,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:53:21,166 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2982 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:53:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 269 transitions, 3758 flow [2024-06-28 00:53:21,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 269 transitions, 3613 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:21,988 INFO L231 Difference]: Finished difference. Result has 194 places, 239 transitions, 3004 flow [2024-06-28 00:53:21,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3004, PETRI_PLACES=194, PETRI_TRANSITIONS=239} [2024-06-28 00:53:21,989 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-28 00:53:21,989 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 239 transitions, 3004 flow [2024-06-28 00:53:21,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:21,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:21,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:21,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:53:21,990 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:21,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:21,990 INFO L85 PathProgramCache]: Analyzing trace with hash -973554848, now seen corresponding path program 2 times [2024-06-28 00:53:21,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:21,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372596100] [2024-06-28 00:53:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:21,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:22,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:22,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372596100] [2024-06-28 00:53:22,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372596100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:22,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:22,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:22,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552822177] [2024-06-28 00:53:22,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:22,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:22,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:22,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:22,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:22,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:22,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 239 transitions, 3004 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:22,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:22,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:22,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:23,401 INFO L124 PetriNetUnfolderBase]: 6247/10336 cut-off events. [2024-06-28 00:53:23,401 INFO L125 PetriNetUnfolderBase]: For 283699/283741 co-relation queries the response was YES. [2024-06-28 00:53:23,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57925 conditions, 10336 events. 6247/10336 cut-off events. For 283699/283741 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 81342 event pairs, 2003 based on Foata normal form. 35/10322 useless extension candidates. Maximal degree in co-relation 57831. Up to 8777 conditions per place. [2024-06-28 00:53:23,504 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 188 selfloop transitions, 60 changer transitions 0/277 dead transitions. [2024-06-28 00:53:23,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 277 transitions, 3944 flow [2024-06-28 00:53:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:53:23,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:53:23,505 INFO L175 Difference]: Start difference. First operand has 194 places, 239 transitions, 3004 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:53:23,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 277 transitions, 3944 flow [2024-06-28 00:53:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 277 transitions, 3805 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:24,478 INFO L231 Difference]: Finished difference. Result has 196 places, 242 transitions, 3064 flow [2024-06-28 00:53:24,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3064, PETRI_PLACES=196, PETRI_TRANSITIONS=242} [2024-06-28 00:53:24,479 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2024-06-28 00:53:24,479 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 242 transitions, 3064 flow [2024-06-28 00:53:24,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:24,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:24,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:24,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:53:24,480 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:24,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-28 00:53:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:24,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882499820] [2024-06-28 00:53:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:24,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:24,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:24,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882499820] [2024-06-28 00:53:24,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882499820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:24,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:24,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:24,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848976218] [2024-06-28 00:53:24,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:24,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:24,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:24,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:24,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 242 transitions, 3064 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:24,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:24,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:24,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:25,895 INFO L124 PetriNetUnfolderBase]: 6477/10650 cut-off events. [2024-06-28 00:53:25,896 INFO L125 PetriNetUnfolderBase]: For 288304/288307 co-relation queries the response was YES. [2024-06-28 00:53:25,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59877 conditions, 10650 events. 6477/10650 cut-off events. For 288304/288307 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 83072 event pairs, 2075 based on Foata normal form. 4/10644 useless extension candidates. Maximal degree in co-relation 59782. Up to 9675 conditions per place. [2024-06-28 00:53:26,022 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 237 selfloop transitions, 31 changer transitions 0/281 dead transitions. [2024-06-28 00:53:26,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 281 transitions, 3932 flow [2024-06-28 00:53:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-28 00:53:26,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:26,024 INFO L175 Difference]: Start difference. First operand has 196 places, 242 transitions, 3064 flow. Second operand 6 states and 174 transitions. [2024-06-28 00:53:26,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 281 transitions, 3932 flow [2024-06-28 00:53:27,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 281 transitions, 3828 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:27,053 INFO L231 Difference]: Finished difference. Result has 200 places, 247 transitions, 3155 flow [2024-06-28 00:53:27,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3155, PETRI_PLACES=200, PETRI_TRANSITIONS=247} [2024-06-28 00:53:27,053 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 151 predicate places. [2024-06-28 00:53:27,053 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 247 transitions, 3155 flow [2024-06-28 00:53:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:27,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:27,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:53:27,054 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:27,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -480968952, now seen corresponding path program 2 times [2024-06-28 00:53:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705460768] [2024-06-28 00:53:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705460768] [2024-06-28 00:53:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705460768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:27,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:27,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101173403] [2024-06-28 00:53:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:27,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 247 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:28,470 INFO L124 PetriNetUnfolderBase]: 6472/10643 cut-off events. [2024-06-28 00:53:28,470 INFO L125 PetriNetUnfolderBase]: For 296031/296034 co-relation queries the response was YES. [2024-06-28 00:53:28,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60012 conditions, 10643 events. 6472/10643 cut-off events. For 296031/296034 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 83100 event pairs, 2121 based on Foata normal form. 4/10637 useless extension candidates. Maximal degree in co-relation 59914. Up to 9801 conditions per place. [2024-06-28 00:53:28,582 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 234 selfloop transitions, 26 changer transitions 0/273 dead transitions. [2024-06-28 00:53:28,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 273 transitions, 3767 flow [2024-06-28 00:53:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 00:53:28,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-28 00:53:28,589 INFO L175 Difference]: Start difference. First operand has 200 places, 247 transitions, 3155 flow. Second operand 6 states and 166 transitions. [2024-06-28 00:53:28,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 273 transitions, 3767 flow [2024-06-28 00:53:29,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 273 transitions, 3651 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:29,558 INFO L231 Difference]: Finished difference. Result has 204 places, 247 transitions, 3096 flow [2024-06-28 00:53:29,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3096, PETRI_PLACES=204, PETRI_TRANSITIONS=247} [2024-06-28 00:53:29,559 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 155 predicate places. [2024-06-28 00:53:29,559 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 247 transitions, 3096 flow [2024-06-28 00:53:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:29,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:29,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:29,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:53:29,559 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:29,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-28 00:53:29,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:29,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453670691] [2024-06-28 00:53:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:29,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:29,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453670691] [2024-06-28 00:53:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453670691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:29,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932248330] [2024-06-28 00:53:29,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:53:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:53:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:53:29,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:53:29,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 247 transitions, 3096 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:29,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:29,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:53:29,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:31,647 INFO L124 PetriNetUnfolderBase]: 8233/15403 cut-off events. [2024-06-28 00:53:31,648 INFO L125 PetriNetUnfolderBase]: For 323072/324237 co-relation queries the response was YES. [2024-06-28 00:53:31,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75153 conditions, 15403 events. 8233/15403 cut-off events. For 323072/324237 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 145489 event pairs, 2296 based on Foata normal form. 694/14904 useless extension candidates. Maximal degree in co-relation 75053. Up to 4306 conditions per place. [2024-06-28 00:53:31,840 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 157 selfloop transitions, 162 changer transitions 148/581 dead transitions. [2024-06-28 00:53:31,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 581 transitions, 7664 flow [2024-06-28 00:53:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 00:53:31,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-28 00:53:31,842 INFO L175 Difference]: Start difference. First operand has 204 places, 247 transitions, 3096 flow. Second operand 7 states and 223 transitions. [2024-06-28 00:53:31,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 581 transitions, 7664 flow [2024-06-28 00:53:33,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 581 transitions, 7513 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:33,052 INFO L231 Difference]: Finished difference. Result has 212 places, 348 transitions, 4963 flow [2024-06-28 00:53:33,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4963, PETRI_PLACES=212, PETRI_TRANSITIONS=348} [2024-06-28 00:53:33,052 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2024-06-28 00:53:33,053 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 348 transitions, 4963 flow [2024-06-28 00:53:33,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:33,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:33,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:33,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:53:33,053 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:33,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2054690222, now seen corresponding path program 1 times [2024-06-28 00:53:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:33,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098231510] [2024-06-28 00:53:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:33,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:33,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098231510] [2024-06-28 00:53:33,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098231510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:33,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:33,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:53:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956629869] [2024-06-28 00:53:33,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:53:33,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:53:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:53:33,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:33,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 348 transitions, 4963 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) [2024-06-28 00:53:33,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:33,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:33,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:35,732 INFO L124 PetriNetUnfolderBase]: 10001/17454 cut-off events. [2024-06-28 00:53:35,732 INFO L125 PetriNetUnfolderBase]: For 480385/480837 co-relation queries the response was YES. [2024-06-28 00:53:35,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103055 conditions, 17454 events. 10001/17454 cut-off events. For 480385/480837 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 151415 event pairs, 5006 based on Foata normal form. 345/17621 useless extension candidates. Maximal degree in co-relation 102949. Up to 15204 conditions per place. [2024-06-28 00:53:35,955 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 291 selfloop transitions, 28 changer transitions 66/399 dead transitions. [2024-06-28 00:53:35,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 399 transitions, 6008 flow [2024-06-28 00:53:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 00:53:35,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-28 00:53:35,956 INFO L175 Difference]: Start difference. First operand has 212 places, 348 transitions, 4963 flow. Second operand 7 states and 194 transitions. [2024-06-28 00:53:35,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 399 transitions, 6008 flow [2024-06-28 00:53:37,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 399 transitions, 5994 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:37,866 INFO L231 Difference]: Finished difference. Result has 220 places, 294 transitions, 4267 flow [2024-06-28 00:53:37,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4267, PETRI_PLACES=220, PETRI_TRANSITIONS=294} [2024-06-28 00:53:37,867 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 171 predicate places. [2024-06-28 00:53:37,867 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 294 transitions, 4267 flow [2024-06-28 00:53:37,868 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) [2024-06-28 00:53:37,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:37,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:53:37,868 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:37,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1226959430, now seen corresponding path program 2 times [2024-06-28 00:53:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808041406] [2024-06-28 00:53:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:38,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:38,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808041406] [2024-06-28 00:53:38,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808041406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:38,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:38,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:53:38,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418817047] [2024-06-28 00:53:38,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:38,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:53:38,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:38,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:53:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:53:38,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:38,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 294 transitions, 4267 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) [2024-06-28 00:53:38,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:38,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:38,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:40,466 INFO L124 PetriNetUnfolderBase]: 8675/15414 cut-off events. [2024-06-28 00:53:40,466 INFO L125 PetriNetUnfolderBase]: For 473679/474075 co-relation queries the response was YES. [2024-06-28 00:53:40,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92681 conditions, 15414 events. 8675/15414 cut-off events. For 473679/474075 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 133368 event pairs, 4572 based on Foata normal form. 324/15677 useless extension candidates. Maximal degree in co-relation 92571. Up to 13238 conditions per place. [2024-06-28 00:53:40,725 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 297 selfloop transitions, 27 changer transitions 0/338 dead transitions. [2024-06-28 00:53:40,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 5211 flow [2024-06-28 00:53:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-28 00:53:40,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-28 00:53:40,727 INFO L175 Difference]: Start difference. First operand has 220 places, 294 transitions, 4267 flow. Second operand 8 states and 217 transitions. [2024-06-28 00:53:40,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 5211 flow [2024-06-28 00:53:43,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 338 transitions, 5127 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:43,071 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 4273 flow [2024-06-28 00:53:43,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4273, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2024-06-28 00:53:43,072 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 174 predicate places. [2024-06-28 00:53:43,072 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 4273 flow [2024-06-28 00:53:43,072 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) [2024-06-28 00:53:43,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:43,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:53:43,072 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:43,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1227285860, now seen corresponding path program 3 times [2024-06-28 00:53:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:43,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857649688] [2024-06-28 00:53:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:43,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857649688] [2024-06-28 00:53:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857649688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:43,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:43,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:53:43,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612942748] [2024-06-28 00:53:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:53:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:53:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:53:43,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:43,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 4273 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) [2024-06-28 00:53:43,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:43,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:43,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:46,349 INFO L124 PetriNetUnfolderBase]: 8812/15119 cut-off events. [2024-06-28 00:53:46,349 INFO L125 PetriNetUnfolderBase]: For 479909/480392 co-relation queries the response was YES. [2024-06-28 00:53:46,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92859 conditions, 15119 events. 8812/15119 cut-off events. For 479909/480392 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 126388 event pairs, 3298 based on Foata normal form. 369/15298 useless extension candidates. Maximal degree in co-relation 92747. Up to 13593 conditions per place. [2024-06-28 00:53:46,530 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 293 selfloop transitions, 24 changer transitions 0/331 dead transitions. [2024-06-28 00:53:46,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 331 transitions, 5061 flow [2024-06-28 00:53:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-28 00:53:46,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063492063492063 [2024-06-28 00:53:46,532 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 4273 flow. Second operand 7 states and 191 transitions. [2024-06-28 00:53:46,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 331 transitions, 5061 flow [2024-06-28 00:53:48,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 4958 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:48,418 INFO L231 Difference]: Finished difference. Result has 224 places, 296 transitions, 4223 flow [2024-06-28 00:53:48,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4223, PETRI_PLACES=224, PETRI_TRANSITIONS=296} [2024-06-28 00:53:48,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 175 predicate places. [2024-06-28 00:53:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 296 transitions, 4223 flow [2024-06-28 00:53:48,419 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) [2024-06-28 00:53:48,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:48,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:53:48,419 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:48,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1049800010, now seen corresponding path program 1 times [2024-06-28 00:53:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665251282] [2024-06-28 00:53:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:48,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665251282] [2024-06-28 00:53:48,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665251282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:48,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:53:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412667693] [2024-06-28 00:53:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:48,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:53:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:48,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:53:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:53:48,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:48,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 296 transitions, 4223 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) [2024-06-28 00:53:48,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:48,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:48,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:51,303 INFO L124 PetriNetUnfolderBase]: 9027/15395 cut-off events. [2024-06-28 00:53:51,303 INFO L125 PetriNetUnfolderBase]: For 497581/498035 co-relation queries the response was YES. [2024-06-28 00:53:51,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95580 conditions, 15395 events. 9027/15395 cut-off events. For 497581/498035 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 127710 event pairs, 3179 based on Foata normal form. 428/15682 useless extension candidates. Maximal degree in co-relation 95467. Up to 13356 conditions per place. [2024-06-28 00:53:51,451 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 223 selfloop transitions, 121 changer transitions 0/358 dead transitions. [2024-06-28 00:53:51,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 358 transitions, 5577 flow [2024-06-28 00:53:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:53:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:53:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 288 transitions. [2024-06-28 00:53:51,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-28 00:53:51,460 INFO L175 Difference]: Start difference. First operand has 224 places, 296 transitions, 4223 flow. Second operand 10 states and 288 transitions. [2024-06-28 00:53:51,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 358 transitions, 5577 flow [2024-06-28 00:53:53,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 358 transitions, 5530 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:53,545 INFO L231 Difference]: Finished difference. Result has 229 places, 305 transitions, 4590 flow [2024-06-28 00:53:53,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4590, PETRI_PLACES=229, PETRI_TRANSITIONS=305} [2024-06-28 00:53:53,546 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-28 00:53:53,546 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 305 transitions, 4590 flow [2024-06-28 00:53:53,546 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) [2024-06-28 00:53:53,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:53,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:53,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:53:53,546 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:53,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:53,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1049920166, now seen corresponding path program 1 times [2024-06-28 00:53:53,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:53,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447903181] [2024-06-28 00:53:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:53,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:53,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447903181] [2024-06-28 00:53:53,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447903181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:53,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:53,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:53:53,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698947020] [2024-06-28 00:53:53,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:53,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:53:53,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:53,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:53:53,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:53:53,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:53,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 305 transitions, 4590 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) [2024-06-28 00:53:53,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:53,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:53,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:56,566 INFO L124 PetriNetUnfolderBase]: 9079/15523 cut-off events. [2024-06-28 00:53:56,567 INFO L125 PetriNetUnfolderBase]: For 531731/532167 co-relation queries the response was YES. [2024-06-28 00:53:56,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100091 conditions, 15523 events. 9079/15523 cut-off events. For 531731/532167 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 129574 event pairs, 3258 based on Foata normal form. 395/15773 useless extension candidates. Maximal degree in co-relation 99977. Up to 13896 conditions per place. [2024-06-28 00:53:56,729 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 275 selfloop transitions, 58 changer transitions 0/347 dead transitions. [2024-06-28 00:53:56,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 347 transitions, 5468 flow [2024-06-28 00:53:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-28 00:53:56,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 00:53:56,730 INFO L175 Difference]: Start difference. First operand has 229 places, 305 transitions, 4590 flow. Second operand 8 states and 220 transitions. [2024-06-28 00:53:56,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 347 transitions, 5468 flow [2024-06-28 00:53:58,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 347 transitions, 5260 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:58,928 INFO L231 Difference]: Finished difference. Result has 233 places, 314 transitions, 4640 flow [2024-06-28 00:53:58,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4640, PETRI_PLACES=233, PETRI_TRANSITIONS=314} [2024-06-28 00:53:58,929 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 184 predicate places. [2024-06-28 00:53:58,929 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 314 transitions, 4640 flow [2024-06-28 00:53:58,934 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) [2024-06-28 00:53:58,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:58,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:58,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:53:58,935 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:58,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1227051686, now seen corresponding path program 2 times [2024-06-28 00:53:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:58,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929211669] [2024-06-28 00:53:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:59,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:59,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929211669] [2024-06-28 00:53:59,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929211669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:59,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:59,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:53:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860825432] [2024-06-28 00:53:59,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:59,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:53:59,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:53:59,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:53:59,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:59,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 314 transitions, 4640 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) [2024-06-28 00:53:59,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:59,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:01,987 INFO L124 PetriNetUnfolderBase]: 9207/15678 cut-off events. [2024-06-28 00:54:01,988 INFO L125 PetriNetUnfolderBase]: For 549224/549690 co-relation queries the response was YES. [2024-06-28 00:54:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101735 conditions, 15678 events. 9207/15678 cut-off events. For 549224/549690 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 130204 event pairs, 3192 based on Foata normal form. 426/15966 useless extension candidates. Maximal degree in co-relation 101618. Up to 13995 conditions per place. [2024-06-28 00:54:02,194 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 276 selfloop transitions, 76 changer transitions 0/366 dead transitions. [2024-06-28 00:54:02,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 366 transitions, 5940 flow [2024-06-28 00:54:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:54:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:54:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-28 00:54:02,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-28 00:54:02,196 INFO L175 Difference]: Start difference. First operand has 233 places, 314 transitions, 4640 flow. Second operand 9 states and 246 transitions. [2024-06-28 00:54:02,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 366 transitions, 5940 flow [2024-06-28 00:54:04,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 366 transitions, 5782 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:54:04,186 INFO L231 Difference]: Finished difference. Result has 238 places, 328 transitions, 4868 flow [2024-06-28 00:54:04,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4868, PETRI_PLACES=238, PETRI_TRANSITIONS=328} [2024-06-28 00:54:04,187 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 189 predicate places. [2024-06-28 00:54:04,188 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 328 transitions, 4868 flow [2024-06-28 00:54:04,188 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) [2024-06-28 00:54:04,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:04,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:04,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:54:04,188 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:04,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash 278622760, now seen corresponding path program 3 times [2024-06-28 00:54:04,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:04,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089548618] [2024-06-28 00:54:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:04,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:04,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:04,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089548618] [2024-06-28 00:54:04,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089548618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:04,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:04,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685170920] [2024-06-28 00:54:04,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:04,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:04,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:04,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:04,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 328 transitions, 4868 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) [2024-06-28 00:54:04,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:04,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:07,347 INFO L124 PetriNetUnfolderBase]: 9124/15580 cut-off events. [2024-06-28 00:54:07,348 INFO L125 PetriNetUnfolderBase]: For 559905/560342 co-relation queries the response was YES. [2024-06-28 00:54:07,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101429 conditions, 15580 events. 9124/15580 cut-off events. For 559905/560342 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 129842 event pairs, 3189 based on Foata normal form. 401/15848 useless extension candidates. Maximal degree in co-relation 101310. Up to 13857 conditions per place. [2024-06-28 00:54:07,527 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 269 selfloop transitions, 83 changer transitions 0/366 dead transitions. [2024-06-28 00:54:07,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 366 transitions, 6011 flow [2024-06-28 00:54:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-28 00:54:07,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 00:54:07,551 INFO L175 Difference]: Start difference. First operand has 238 places, 328 transitions, 4868 flow. Second operand 8 states and 220 transitions. [2024-06-28 00:54:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 366 transitions, 6011 flow [2024-06-28 00:54:09,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 366 transitions, 5961 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-28 00:54:09,784 INFO L231 Difference]: Finished difference. Result has 247 places, 334 transitions, 5180 flow [2024-06-28 00:54:09,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5180, PETRI_PLACES=247, PETRI_TRANSITIONS=334} [2024-06-28 00:54:09,785 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 198 predicate places. [2024-06-28 00:54:09,785 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 334 transitions, 5180 flow [2024-06-28 00:54:09,785 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) [2024-06-28 00:54:09,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:09,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:09,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:54:09,785 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:09,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:09,786 INFO L85 PathProgramCache]: Analyzing trace with hash 591133244, now seen corresponding path program 4 times [2024-06-28 00:54:09,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:09,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308303205] [2024-06-28 00:54:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:09,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:09,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308303205] [2024-06-28 00:54:09,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308303205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:09,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:09,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:09,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127377470] [2024-06-28 00:54:09,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:09,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:09,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:09,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:09,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:09,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 334 transitions, 5180 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) [2024-06-28 00:54:09,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:09,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:09,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:12,825 INFO L124 PetriNetUnfolderBase]: 8881/15775 cut-off events. [2024-06-28 00:54:12,825 INFO L125 PetriNetUnfolderBase]: For 585235/585655 co-relation queries the response was YES. [2024-06-28 00:54:12,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100731 conditions, 15775 events. 8881/15775 cut-off events. For 585235/585655 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 136755 event pairs, 4576 based on Foata normal form. 327/16024 useless extension candidates. Maximal degree in co-relation 100608. Up to 13538 conditions per place. [2024-06-28 00:54:13,283 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 315 selfloop transitions, 32 changer transitions 0/361 dead transitions. [2024-06-28 00:54:13,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 361 transitions, 6015 flow [2024-06-28 00:54:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:54:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:54:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-28 00:54:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6074074074074074 [2024-06-28 00:54:13,285 INFO L175 Difference]: Start difference. First operand has 247 places, 334 transitions, 5180 flow. Second operand 6 states and 164 transitions. [2024-06-28 00:54:13,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 361 transitions, 6015 flow [2024-06-28 00:54:15,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 361 transitions, 5844 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:15,526 INFO L231 Difference]: Finished difference. Result has 249 places, 335 transitions, 5089 flow [2024-06-28 00:54:15,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5089, PETRI_PLACES=249, PETRI_TRANSITIONS=335} [2024-06-28 00:54:15,527 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 200 predicate places. [2024-06-28 00:54:15,527 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 335 transitions, 5089 flow [2024-06-28 00:54:15,527 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) [2024-06-28 00:54:15,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:15,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:54:15,528 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:15,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash 580408484, now seen corresponding path program 5 times [2024-06-28 00:54:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142387405] [2024-06-28 00:54:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:15,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142387405] [2024-06-28 00:54:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142387405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:15,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720558404] [2024-06-28 00:54:15,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:15,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:15,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:15,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 335 transitions, 5089 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) [2024-06-28 00:54:15,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:15,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:15,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:18,651 INFO L124 PetriNetUnfolderBase]: 9179/15708 cut-off events. [2024-06-28 00:54:18,651 INFO L125 PetriNetUnfolderBase]: For 599893/600403 co-relation queries the response was YES. [2024-06-28 00:54:18,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102333 conditions, 15708 events. 9179/15708 cut-off events. For 599893/600403 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 131305 event pairs, 3302 based on Foata normal form. 391/15923 useless extension candidates. Maximal degree in co-relation 102209. Up to 13994 conditions per place. [2024-06-28 00:54:18,840 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 325 selfloop transitions, 35 changer transitions 0/374 dead transitions. [2024-06-28 00:54:18,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 374 transitions, 5988 flow [2024-06-28 00:54:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-28 00:54:18,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-28 00:54:18,842 INFO L175 Difference]: Start difference. First operand has 249 places, 335 transitions, 5089 flow. Second operand 8 states and 215 transitions. [2024-06-28 00:54:18,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 374 transitions, 5988 flow [2024-06-28 00:54:21,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 374 transitions, 5925 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:21,406 INFO L231 Difference]: Finished difference. Result has 253 places, 336 transitions, 5117 flow [2024-06-28 00:54:21,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5117, PETRI_PLACES=253, PETRI_TRANSITIONS=336} [2024-06-28 00:54:21,407 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 204 predicate places. [2024-06-28 00:54:21,407 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 336 transitions, 5117 flow [2024-06-28 00:54:21,407 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) [2024-06-28 00:54:21,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:21,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:21,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:54:21,407 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:21,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 580082054, now seen corresponding path program 6 times [2024-06-28 00:54:21,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:21,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823408997] [2024-06-28 00:54:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:21,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:21,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:21,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823408997] [2024-06-28 00:54:21,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823408997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:21,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:21,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12928177] [2024-06-28 00:54:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:21,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:21,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:21,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:21,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 336 transitions, 5117 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) [2024-06-28 00:54:21,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:21,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:21,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:24,493 INFO L124 PetriNetUnfolderBase]: 8945/15796 cut-off events. [2024-06-28 00:54:24,493 INFO L125 PetriNetUnfolderBase]: For 604500/604938 co-relation queries the response was YES. [2024-06-28 00:54:24,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101205 conditions, 15796 events. 8945/15796 cut-off events. For 604500/604938 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 136204 event pairs, 4100 based on Foata normal form. 365/16072 useless extension candidates. Maximal degree in co-relation 101080. Up to 13247 conditions per place. [2024-06-28 00:54:24,669 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 321 selfloop transitions, 45 changer transitions 0/380 dead transitions. [2024-06-28 00:54:24,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 380 transitions, 6043 flow [2024-06-28 00:54:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-28 00:54:24,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-28 00:54:24,671 INFO L175 Difference]: Start difference. First operand has 253 places, 336 transitions, 5117 flow. Second operand 8 states and 221 transitions. [2024-06-28 00:54:24,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 380 transitions, 6043 flow [2024-06-28 00:54:27,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 380 transitions, 5970 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:54:27,198 INFO L231 Difference]: Finished difference. Result has 254 places, 336 transitions, 5141 flow [2024-06-28 00:54:27,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5141, PETRI_PLACES=254, PETRI_TRANSITIONS=336} [2024-06-28 00:54:27,199 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 205 predicate places. [2024-06-28 00:54:27,199 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 336 transitions, 5141 flow [2024-06-28 00:54:27,199 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) [2024-06-28 00:54:27,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:27,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:27,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:54:27,200 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:27,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 661191906, now seen corresponding path program 4 times [2024-06-28 00:54:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:27,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531419811] [2024-06-28 00:54:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531419811] [2024-06-28 00:54:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531419811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:27,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:27,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:27,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43667009] [2024-06-28 00:54:27,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:27,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:27,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 336 transitions, 5141 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) [2024-06-28 00:54:27,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:27,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:27,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:30,212 INFO L124 PetriNetUnfolderBase]: 9282/15835 cut-off events. [2024-06-28 00:54:30,212 INFO L125 PetriNetUnfolderBase]: For 605967/606414 co-relation queries the response was YES. [2024-06-28 00:54:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104264 conditions, 15835 events. 9282/15835 cut-off events. For 605967/606414 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 131977 event pairs, 3222 based on Foata normal form. 391/16082 useless extension candidates. Maximal degree in co-relation 104139. Up to 13980 conditions per place. [2024-06-28 00:54:30,408 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 270 selfloop transitions, 90 changer transitions 0/374 dead transitions. [2024-06-28 00:54:30,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 374 transitions, 6134 flow [2024-06-28 00:54:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-28 00:54:30,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 00:54:30,409 INFO L175 Difference]: Start difference. First operand has 254 places, 336 transitions, 5141 flow. Second operand 8 states and 230 transitions. [2024-06-28 00:54:30,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 374 transitions, 6134 flow [2024-06-28 00:54:32,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 374 transitions, 6037 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 00:54:32,800 INFO L231 Difference]: Finished difference. Result has 255 places, 340 transitions, 5302 flow [2024-06-28 00:54:32,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5302, PETRI_PLACES=255, PETRI_TRANSITIONS=340} [2024-06-28 00:54:32,801 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 206 predicate places. [2024-06-28 00:54:32,801 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 340 transitions, 5302 flow [2024-06-28 00:54:32,801 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) [2024-06-28 00:54:32,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:32,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:32,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:54:32,802 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:32,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1099575590, now seen corresponding path program 5 times [2024-06-28 00:54:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:32,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325315756] [2024-06-28 00:54:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:32,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325315756] [2024-06-28 00:54:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325315756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:32,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752211795] [2024-06-28 00:54:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:32,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:32,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 340 transitions, 5302 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) [2024-06-28 00:54:32,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:32,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:32,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand