./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.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/safe032_tso.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/safe032_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:02:06,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:02:07,028 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:02:07,032 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:02:07,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:02:07,045 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:02:07,046 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:02:07,046 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:02:07,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:02:07,047 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:02:07,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:02:07,047 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:02:07,048 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:02:07,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:02:07,048 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:02:07,049 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:02:07,049 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:02:07,049 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:02:07,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:02:07,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:02:07,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:02:07,050 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:02:07,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:02:07,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:02:07,051 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:02:07,051 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:02:07,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:02:07,052 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:02:07,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:02:07,052 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:02:07,052 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:02:07,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:02:07,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:02:07,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:02:07,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:02:07,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:02:07,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:02:07,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:02:07,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:02:07,054 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:02:07,054 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:02:07,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:02:07,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:02:07,055 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:02:07,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:02:07,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:02:07,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:02:07,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:02:07,282 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:02:07,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-28 01:02:08,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:02:08,538 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:02:08,539 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-28 01:02:08,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0553f394a/433439bd3d6c455f8c8eec096ce2e35b/FLAG01957422d [2024-06-28 01:02:08,575 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0553f394a/433439bd3d6c455f8c8eec096ce2e35b [2024-06-28 01:02:08,577 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:02:08,579 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:02:08,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_tso.yml/witness.yml [2024-06-28 01:02:08,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:02:08,694 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:02:08,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:02:08,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:02:08,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:02:08,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:02:08" (1/2) ... [2024-06-28 01:02:08,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630e6896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:08, skipping insertion in model container [2024-06-28 01:02:08,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:02:08" (1/2) ... [2024-06-28 01:02:08,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45f36176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:02:08, skipping insertion in model container [2024-06-28 01:02:08,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:02:08" (2/2) ... [2024-06-28 01:02:08,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630e6896 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:08, skipping insertion in model container [2024-06-28 01:02:08,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:02:08" (2/2) ... [2024-06-28 01:02:08,704 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:02:08,740 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:02:08,741 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 01:02:08,741 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 01:02:08,741 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-28 01:02:08,742 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:02:08,742 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-28 01:02:08,774 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:02:08,969 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/safe032_tso.i[945,958] [2024-06-28 01:02:09,099 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:02:09,106 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 01:02:09,133 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/safe032_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:02:09,206 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:02:09,235 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:02:09,235 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09 WrapperNode [2024-06-28 01:02:09,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:02:09,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:02:09,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:02:09,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:02:09,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,267 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-06-28 01:02:09,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:02:09,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:02:09,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:02:09,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:02:09,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,287 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 01:02:09,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,296 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:02:09,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:02:09,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:02:09,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:02:09,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (1/1) ... [2024-06-28 01:02:09,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:02:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:02:09,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 01:02:09,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 01:02:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:02:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:02:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 01:02:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 01:02:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 01:02:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 01:02:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 01:02:09,348 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 01:02:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:02:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:02:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:02:09,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:02:09,350 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:02:09,468 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:02:09,470 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:02:09,633 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:02:09,633 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:02:09,703 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:02:09,703 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 01:02:09,704 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:02:09 BoogieIcfgContainer [2024-06-28 01:02:09,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:02:09,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:02:09,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:02:09,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:02:09,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:02:08" (1/4) ... [2024-06-28 01:02:09,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7111c7ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:02:09, skipping insertion in model container [2024-06-28 01:02:09,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:02:08" (2/4) ... [2024-06-28 01:02:09,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7111c7ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:02:09, skipping insertion in model container [2024-06-28 01:02:09,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:02:09" (3/4) ... [2024-06-28 01:02:09,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7111c7ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:02:09, skipping insertion in model container [2024-06-28 01:02:09,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:02:09" (4/4) ... [2024-06-28 01:02:09,710 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-28 01:02:09,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:02:09,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 01:02:09,723 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:02:09,761 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 01:02:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 01:02:09,837 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-28 01:02:09,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:02:09,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 76 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-28 01:02:09,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-28 01:02:09,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-28 01:02:09,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:02:09,869 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;@137f9dd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:02:09,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 01:02:09,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:02:09,874 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 01:02:09,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:02:09,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:09,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 01:02:09,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:09,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash 209467906, now seen corresponding path program 1 times [2024-06-28 01:02:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390060660] [2024-06-28 01:02:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:10,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:10,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390060660] [2024-06-28 01:02:10,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390060660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:10,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:10,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:02:10,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350654942] [2024-06-28 01:02:10,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:02:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:02:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:02:10,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-06-28 01:02:10,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:10,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:10,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-06-28 01:02:10,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:10,581 INFO L124 PetriNetUnfolderBase]: 943/1712 cut-off events. [2024-06-28 01:02:10,581 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-28 01:02:10,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3180 conditions, 1712 events. 943/1712 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10279 event pairs, 677 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 3168. Up to 1411 conditions per place. [2024-06-28 01:02:10,597 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 32 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2024-06-28 01:02:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 193 flow [2024-06-28 01:02:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:02:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:02:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-28 01:02:10,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2024-06-28 01:02:10,608 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 102 transitions. [2024-06-28 01:02:10,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 193 flow [2024-06-28 01:02:10,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:10,616 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 118 flow [2024-06-28 01:02:10,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-28 01:02:10,620 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-28 01:02:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 118 flow [2024-06-28 01:02:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:10,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:10,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:10,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:02:10,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:10,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash -564045553, now seen corresponding path program 1 times [2024-06-28 01:02:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:10,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595880798] [2024-06-28 01:02:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:10,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595880798] [2024-06-28 01:02:10,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595880798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:10,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:02:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892831866] [2024-06-28 01:02:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:10,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:02:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:02:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:02:10,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-06-28 01:02:10,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:10,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:10,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-06-28 01:02:10,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:11,030 INFO L124 PetriNetUnfolderBase]: 937/1542 cut-off events. [2024-06-28 01:02:11,031 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-28 01:02:11,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1542 events. 937/1542 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8657 event pairs, 421 based on Foata normal form. 3/1498 useless extension candidates. Maximal degree in co-relation 3411. Up to 1383 conditions per place. [2024-06-28 01:02:11,040 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 41 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-28 01:02:11,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 268 flow [2024-06-28 01:02:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:02:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:02:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-06-28 01:02:11,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7180851063829787 [2024-06-28 01:02:11,045 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 118 flow. Second operand 4 states and 135 transitions. [2024-06-28 01:02:11,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 268 flow [2024-06-28 01:02:11,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:11,048 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 154 flow [2024-06-28 01:02:11,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-28 01:02:11,048 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2024-06-28 01:02:11,049 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 154 flow [2024-06-28 01:02:11,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:11,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:02:11,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:11,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1804040492, now seen corresponding path program 1 times [2024-06-28 01:02:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:11,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752192804] [2024-06-28 01:02:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752192804] [2024-06-28 01:02:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752192804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:11,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:11,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:02:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318066680] [2024-06-28 01:02:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:02:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:02:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:02:11,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:11,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:11,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:11,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:11,363 INFO L124 PetriNetUnfolderBase]: 1542/2473 cut-off events. [2024-06-28 01:02:11,364 INFO L125 PetriNetUnfolderBase]: For 1090/1090 co-relation queries the response was YES. [2024-06-28 01:02:11,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 2473 events. 1542/2473 cut-off events. For 1090/1090 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14313 event pairs, 781 based on Foata normal form. 3/2475 useless extension candidates. Maximal degree in co-relation 5955. Up to 2235 conditions per place. [2024-06-28 01:02:11,379 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 45 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-28 01:02:11,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 336 flow [2024-06-28 01:02:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:02:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:02:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-28 01:02:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6861702127659575 [2024-06-28 01:02:11,383 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 154 flow. Second operand 4 states and 129 transitions. [2024-06-28 01:02:11,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 336 flow [2024-06-28 01:02:11,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:11,387 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 218 flow [2024-06-28 01:02:11,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-28 01:02:11,388 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2024-06-28 01:02:11,388 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 218 flow [2024-06-28 01:02:11,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:11,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:11,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:02:11,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:11,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:11,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1263047457, now seen corresponding path program 1 times [2024-06-28 01:02:11,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:11,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793735927] [2024-06-28 01:02:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:11,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:11,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793735927] [2024-06-28 01:02:11,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793735927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:11,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:11,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122706054] [2024-06-28 01:02:11,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:11,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:11,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:11,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-06-28 01:02:11,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:11,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-06-28 01:02:11,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:11,811 INFO L124 PetriNetUnfolderBase]: 1443/2509 cut-off events. [2024-06-28 01:02:11,812 INFO L125 PetriNetUnfolderBase]: For 2218/2218 co-relation queries the response was YES. [2024-06-28 01:02:11,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 2509 events. 1443/2509 cut-off events. For 2218/2218 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15315 event pairs, 570 based on Foata normal form. 6/2436 useless extension candidates. Maximal degree in co-relation 6471. Up to 2031 conditions per place. [2024-06-28 01:02:11,828 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 63 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-06-28 01:02:11,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 470 flow [2024-06-28 01:02:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-28 01:02:11,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-06-28 01:02:11,829 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 218 flow. Second operand 6 states and 192 transitions. [2024-06-28 01:02:11,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 470 flow [2024-06-28 01:02:11,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 01:02:11,832 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 273 flow [2024-06-28 01:02:11,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-28 01:02:11,833 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-28 01:02:11,833 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 273 flow [2024-06-28 01:02:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:11,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:11,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:02:11,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:11,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1352047647, now seen corresponding path program 1 times [2024-06-28 01:02:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076116431] [2024-06-28 01:02:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:11,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:11,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076116431] [2024-06-28 01:02:11,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076116431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:11,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:11,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:11,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843474926] [2024-06-28 01:02:11,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:11,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:11,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:11,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:11,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:11,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:11,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:11,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:11,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:12,149 INFO L124 PetriNetUnfolderBase]: 1604/2648 cut-off events. [2024-06-28 01:02:12,149 INFO L125 PetriNetUnfolderBase]: For 3852/3852 co-relation queries the response was YES. [2024-06-28 01:02:12,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7689 conditions, 2648 events. 1604/2648 cut-off events. For 3852/3852 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15678 event pairs, 510 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 7669. Up to 2145 conditions per place. [2024-06-28 01:02:12,166 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 65 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-06-28 01:02:12,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 102 transitions, 619 flow [2024-06-28 01:02:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:12,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-28 01:02:12,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7106382978723405 [2024-06-28 01:02:12,169 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 273 flow. Second operand 5 states and 167 transitions. [2024-06-28 01:02:12,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 102 transitions, 619 flow [2024-06-28 01:02:12,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 588 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:12,177 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 399 flow [2024-06-28 01:02:12,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-06-28 01:02:12,179 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-28 01:02:12,180 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 399 flow [2024-06-28 01:02:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:12,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:12,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:02:12,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:12,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1460103909, now seen corresponding path program 2 times [2024-06-28 01:02:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212353100] [2024-06-28 01:02:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:12,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:12,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212353100] [2024-06-28 01:02:12,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212353100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:12,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:12,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:12,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824900009] [2024-06-28 01:02:12,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:12,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:12,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:12,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:12,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:12,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:12,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:12,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:12,501 INFO L124 PetriNetUnfolderBase]: 1653/2778 cut-off events. [2024-06-28 01:02:12,502 INFO L125 PetriNetUnfolderBase]: For 6514/6514 co-relation queries the response was YES. [2024-06-28 01:02:12,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 2778 events. 1653/2778 cut-off events. For 6514/6514 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16704 event pairs, 569 based on Foata normal form. 4/2771 useless extension candidates. Maximal degree in co-relation 9228. Up to 2191 conditions per place. [2024-06-28 01:02:12,524 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 61 selfloop transitions, 30 changer transitions 0/106 dead transitions. [2024-06-28 01:02:12,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 735 flow [2024-06-28 01:02:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:12,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-28 01:02:12,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6936170212765957 [2024-06-28 01:02:12,526 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 399 flow. Second operand 5 states and 163 transitions. [2024-06-28 01:02:12,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 735 flow [2024-06-28 01:02:12,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 705 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-28 01:02:12,536 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 562 flow [2024-06-28 01:02:12,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=562, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-28 01:02:12,538 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-28 01:02:12,538 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 562 flow [2024-06-28 01:02:12,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:12,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:02:12,539 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:12,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2118475645, now seen corresponding path program 1 times [2024-06-28 01:02:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:12,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675049008] [2024-06-28 01:02:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675049008] [2024-06-28 01:02:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675049008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:12,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:12,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176696751] [2024-06-28 01:02:12,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:12,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:12,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:12,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 562 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:12,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:12,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:12,890 INFO L124 PetriNetUnfolderBase]: 1661/2810 cut-off events. [2024-06-28 01:02:12,890 INFO L125 PetriNetUnfolderBase]: For 8395/8395 co-relation queries the response was YES. [2024-06-28 01:02:12,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 2810 events. 1661/2810 cut-off events. For 8395/8395 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16850 event pairs, 712 based on Foata normal form. 3/2792 useless extension candidates. Maximal degree in co-relation 9939. Up to 2362 conditions per place. [2024-06-28 01:02:12,912 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 80 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-28 01:02:12,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 866 flow [2024-06-28 01:02:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-28 01:02:12,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6723404255319149 [2024-06-28 01:02:12,914 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 562 flow. Second operand 5 states and 158 transitions. [2024-06-28 01:02:12,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 866 flow [2024-06-28 01:02:12,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 112 transitions, 833 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:12,923 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 626 flow [2024-06-28 01:02:12,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-28 01:02:12,924 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-28 01:02:12,924 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 626 flow [2024-06-28 01:02:12,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:12,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:12,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:02:12,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:12,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash 834651153, now seen corresponding path program 1 times [2024-06-28 01:02:12,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:12,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33099003] [2024-06-28 01:02:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:12,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:13,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:13,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33099003] [2024-06-28 01:02:13,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33099003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:13,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:13,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:02:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737469956] [2024-06-28 01:02:13,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:02:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:02:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:02:13,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:13,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 626 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:13,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:13,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:13,263 INFO L124 PetriNetUnfolderBase]: 1649/2701 cut-off events. [2024-06-28 01:02:13,264 INFO L125 PetriNetUnfolderBase]: For 9757/9757 co-relation queries the response was YES. [2024-06-28 01:02:13,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10138 conditions, 2701 events. 1649/2701 cut-off events. For 9757/9757 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15893 event pairs, 503 based on Foata normal form. 2/2696 useless extension candidates. Maximal degree in co-relation 10108. Up to 2382 conditions per place. [2024-06-28 01:02:13,276 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 76 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2024-06-28 01:02:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 102 transitions, 828 flow [2024-06-28 01:02:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:02:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:02:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-28 01:02:13,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-06-28 01:02:13,278 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 626 flow. Second operand 4 states and 123 transitions. [2024-06-28 01:02:13,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 102 transitions, 828 flow [2024-06-28 01:02:13,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 798 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:13,287 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 626 flow [2024-06-28 01:02:13,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=626, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-28 01:02:13,287 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-28 01:02:13,287 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 626 flow [2024-06-28 01:02:13,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:02:13,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:13,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2084017284, now seen corresponding path program 1 times [2024-06-28 01:02:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041619568] [2024-06-28 01:02:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:13,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:13,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041619568] [2024-06-28 01:02:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041619568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028823374] [2024-06-28 01:02:13,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:13,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:13,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:13,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 626 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:13,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:13,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:13,677 INFO L124 PetriNetUnfolderBase]: 1707/2784 cut-off events. [2024-06-28 01:02:13,677 INFO L125 PetriNetUnfolderBase]: For 10728/10728 co-relation queries the response was YES. [2024-06-28 01:02:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10607 conditions, 2784 events. 1707/2784 cut-off events. For 10728/10728 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16258 event pairs, 470 based on Foata normal form. 3/2784 useless extension candidates. Maximal degree in co-relation 10574. Up to 2421 conditions per place. [2024-06-28 01:02:13,691 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 102 selfloop transitions, 18 changer transitions 0/135 dead transitions. [2024-06-28 01:02:13,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 135 transitions, 1034 flow [2024-06-28 01:02:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-28 01:02:13,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504559270516718 [2024-06-28 01:02:13,693 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 626 flow. Second operand 7 states and 214 transitions. [2024-06-28 01:02:13,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 135 transitions, 1034 flow [2024-06-28 01:02:13,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 135 transitions, 1006 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:13,708 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 724 flow [2024-06-28 01:02:13,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-28 01:02:13,709 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 35 predicate places. [2024-06-28 01:02:13,709 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 724 flow [2024-06-28 01:02:13,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:13,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:13,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:02:13,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:13,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2057284994, now seen corresponding path program 2 times [2024-06-28 01:02:13,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:13,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229370361] [2024-06-28 01:02:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:13,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:13,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229370361] [2024-06-28 01:02:13,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229370361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:13,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:13,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534981746] [2024-06-28 01:02:13,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:13,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:13,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:13,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:13,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:13,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 724 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:13,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:13,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:14,127 INFO L124 PetriNetUnfolderBase]: 1806/3011 cut-off events. [2024-06-28 01:02:14,127 INFO L125 PetriNetUnfolderBase]: For 14571/14571 co-relation queries the response was YES. [2024-06-28 01:02:14,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12060 conditions, 3011 events. 1806/3011 cut-off events. For 14571/14571 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18388 event pairs, 503 based on Foata normal form. 4/2999 useless extension candidates. Maximal degree in co-relation 12026. Up to 2176 conditions per place. [2024-06-28 01:02:14,146 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 84 selfloop transitions, 52 changer transitions 0/151 dead transitions. [2024-06-28 01:02:14,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 151 transitions, 1312 flow [2024-06-28 01:02:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-28 01:02:14,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7127659574468085 [2024-06-28 01:02:14,147 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 724 flow. Second operand 6 states and 201 transitions. [2024-06-28 01:02:14,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 151 transitions, 1312 flow [2024-06-28 01:02:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 1260 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:14,164 INFO L231 Difference]: Finished difference. Result has 90 places, 115 transitions, 959 flow [2024-06-28 01:02:14,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=959, PETRI_PLACES=90, PETRI_TRANSITIONS=115} [2024-06-28 01:02:14,166 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 39 predicate places. [2024-06-28 01:02:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 115 transitions, 959 flow [2024-06-28 01:02:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:14,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:02:14,166 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 01:02:14,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2079248740, now seen corresponding path program 1 times [2024-06-28 01:02:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:14,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459147046] [2024-06-28 01:02:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:14,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:14,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459147046] [2024-06-28 01:02:14,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459147046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:14,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:14,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:14,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079070579] [2024-06-28 01:02:14,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:14,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:14,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:14,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:14,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 115 transitions, 959 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:14,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:14,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:14,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:14,574 INFO L124 PetriNetUnfolderBase]: 1863/3108 cut-off events. [2024-06-28 01:02:14,574 INFO L125 PetriNetUnfolderBase]: For 18900/18900 co-relation queries the response was YES. [2024-06-28 01:02:14,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13644 conditions, 3108 events. 1863/3108 cut-off events. For 18900/18900 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19090 event pairs, 482 based on Foata normal form. 4/3093 useless extension candidates. Maximal degree in co-relation 13607. Up to 2310 conditions per place. [2024-06-28 01:02:14,594 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 106 selfloop transitions, 41 changer transitions 0/162 dead transitions. [2024-06-28 01:02:14,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 162 transitions, 1505 flow [2024-06-28 01:02:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-28 01:02:14,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7056737588652482 [2024-06-28 01:02:14,596 INFO L175 Difference]: Start difference. First operand has 90 places, 115 transitions, 959 flow. Second operand 6 states and 199 transitions. [2024-06-28 01:02:14,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 162 transitions, 1505 flow [2024-06-28 01:02:14,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 162 transitions, 1445 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-28 01:02:14,621 INFO L231 Difference]: Finished difference. Result has 97 places, 128 transitions, 1122 flow [2024-06-28 01:02:14,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1122, PETRI_PLACES=97, PETRI_TRANSITIONS=128} [2024-06-28 01:02:14,622 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-06-28 01:02:14,622 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 128 transitions, 1122 flow [2024-06-28 01:02:14,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:14,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:14,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:14,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:02:14,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:14,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1167421954, now seen corresponding path program 3 times [2024-06-28 01:02:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:14,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880698774] [2024-06-28 01:02:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:14,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:14,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:14,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880698774] [2024-06-28 01:02:14,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880698774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:14,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:14,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735689968] [2024-06-28 01:02:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:14,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:14,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 128 transitions, 1122 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:14,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:14,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:14,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:14,985 INFO L124 PetriNetUnfolderBase]: 1896/3158 cut-off events. [2024-06-28 01:02:14,985 INFO L125 PetriNetUnfolderBase]: For 21455/21455 co-relation queries the response was YES. [2024-06-28 01:02:14,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14556 conditions, 3158 events. 1896/3158 cut-off events. For 21455/21455 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19493 event pairs, 510 based on Foata normal form. 4/3145 useless extension candidates. Maximal degree in co-relation 14515. Up to 2289 conditions per place. [2024-06-28 01:02:15,007 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 95 selfloop transitions, 56 changer transitions 0/166 dead transitions. [2024-06-28 01:02:15,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 166 transitions, 1630 flow [2024-06-28 01:02:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-28 01:02:15,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914893617021277 [2024-06-28 01:02:15,008 INFO L175 Difference]: Start difference. First operand has 97 places, 128 transitions, 1122 flow. Second operand 6 states and 195 transitions. [2024-06-28 01:02:15,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 166 transitions, 1630 flow [2024-06-28 01:02:15,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 166 transitions, 1581 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:15,040 INFO L231 Difference]: Finished difference. Result has 103 places, 137 transitions, 1325 flow [2024-06-28 01:02:15,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=103, PETRI_TRANSITIONS=137} [2024-06-28 01:02:15,041 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 52 predicate places. [2024-06-28 01:02:15,041 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 137 transitions, 1325 flow [2024-06-28 01:02:15,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:15,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:15,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:02:15,042 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:15,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:15,042 INFO L85 PathProgramCache]: Analyzing trace with hash -60129526, now seen corresponding path program 2 times [2024-06-28 01:02:15,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:15,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690980737] [2024-06-28 01:02:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:15,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:15,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:15,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690980737] [2024-06-28 01:02:15,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690980737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:15,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:15,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545673631] [2024-06-28 01:02:15,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:15,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:15,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:15,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 137 transitions, 1325 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:15,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:15,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:15,460 INFO L124 PetriNetUnfolderBase]: 1993/3351 cut-off events. [2024-06-28 01:02:15,460 INFO L125 PetriNetUnfolderBase]: For 26000/26000 co-relation queries the response was YES. [2024-06-28 01:02:15,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16039 conditions, 3351 events. 1993/3351 cut-off events. For 26000/26000 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21001 event pairs, 511 based on Foata normal form. 4/3341 useless extension candidates. Maximal degree in co-relation 15994. Up to 2442 conditions per place. [2024-06-28 01:02:15,483 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 115 selfloop transitions, 52 changer transitions 0/182 dead transitions. [2024-06-28 01:02:15,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 182 transitions, 1963 flow [2024-06-28 01:02:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-28 01:02:15,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7021276595744681 [2024-06-28 01:02:15,485 INFO L175 Difference]: Start difference. First operand has 103 places, 137 transitions, 1325 flow. Second operand 6 states and 198 transitions. [2024-06-28 01:02:15,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 182 transitions, 1963 flow [2024-06-28 01:02:15,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 182 transitions, 1884 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:15,515 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1531 flow [2024-06-28 01:02:15,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2024-06-28 01:02:15,516 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-28 01:02:15,516 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1531 flow [2024-06-28 01:02:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:15,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:02:15,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:15,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -51558646, now seen corresponding path program 3 times [2024-06-28 01:02:15,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:15,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920086809] [2024-06-28 01:02:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:15,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920086809] [2024-06-28 01:02:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920086809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:15,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183778444] [2024-06-28 01:02:15,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:15,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:15,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1531 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:15,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:15,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:15,918 INFO L124 PetriNetUnfolderBase]: 1984/3362 cut-off events. [2024-06-28 01:02:15,919 INFO L125 PetriNetUnfolderBase]: For 28913/28913 co-relation queries the response was YES. [2024-06-28 01:02:15,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16300 conditions, 3362 events. 1984/3362 cut-off events. For 28913/28913 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21132 event pairs, 503 based on Foata normal form. 4/3352 useless extension candidates. Maximal degree in co-relation 16252. Up to 2436 conditions per place. [2024-06-28 01:02:15,942 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 115 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-06-28 01:02:15,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 2011 flow [2024-06-28 01:02:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-28 01:02:15,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6950354609929078 [2024-06-28 01:02:15,943 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1531 flow. Second operand 6 states and 196 transitions. [2024-06-28 01:02:15,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 2011 flow [2024-06-28 01:02:15,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 181 transitions, 1959 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-28 01:02:15,982 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1592 flow [2024-06-28 01:02:15,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1592, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-06-28 01:02:15,983 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 63 predicate places. [2024-06-28 01:02:15,983 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1592 flow [2024-06-28 01:02:15,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:15,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:15,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:02:15,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash 40622396, now seen corresponding path program 1 times [2024-06-28 01:02:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:15,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971333370] [2024-06-28 01:02:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:16,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:16,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971333370] [2024-06-28 01:02:16,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971333370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:16,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:16,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:16,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379973985] [2024-06-28 01:02:16,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:16,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:16,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:16,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:16,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:16,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:16,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1592 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:16,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:16,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:16,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:16,438 INFO L124 PetriNetUnfolderBase]: 1994/3321 cut-off events. [2024-06-28 01:02:16,439 INFO L125 PetriNetUnfolderBase]: For 31572/31572 co-relation queries the response was YES. [2024-06-28 01:02:16,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16795 conditions, 3321 events. 1994/3321 cut-off events. For 31572/31572 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20572 event pairs, 449 based on Foata normal form. 6/3325 useless extension candidates. Maximal degree in co-relation 16744. Up to 2785 conditions per place. [2024-06-28 01:02:16,462 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 148 selfloop transitions, 20 changer transitions 0/183 dead transitions. [2024-06-28 01:02:16,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2072 flow [2024-06-28 01:02:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 01:02:16,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631205673758865 [2024-06-28 01:02:16,463 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1592 flow. Second operand 6 states and 187 transitions. [2024-06-28 01:02:16,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2072 flow [2024-06-28 01:02:16,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1961 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:16,502 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1583 flow [2024-06-28 01:02:16,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1583, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-28 01:02:16,503 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-28 01:02:16,503 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1583 flow [2024-06-28 01:02:16,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:16,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:16,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:16,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:02:16,503 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:16,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash 104383259, now seen corresponding path program 1 times [2024-06-28 01:02:16,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:16,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543891647] [2024-06-28 01:02:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:16,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:16,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543891647] [2024-06-28 01:02:16,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543891647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:16,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:16,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:16,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247675987] [2024-06-28 01:02:16,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:16,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:16,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:16,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:16,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1583 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:16,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:16,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:16,912 INFO L124 PetriNetUnfolderBase]: 1986/3338 cut-off events. [2024-06-28 01:02:16,912 INFO L125 PetriNetUnfolderBase]: For 33005/33005 co-relation queries the response was YES. [2024-06-28 01:02:16,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16738 conditions, 3338 events. 1986/3338 cut-off events. For 33005/33005 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20947 event pairs, 479 based on Foata normal form. 4/3326 useless extension candidates. Maximal degree in co-relation 16686. Up to 2667 conditions per place. [2024-06-28 01:02:16,936 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 126 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-28 01:02:16,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 1993 flow [2024-06-28 01:02:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-28 01:02:16,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638297872340425 [2024-06-28 01:02:16,938 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1583 flow. Second operand 5 states and 156 transitions. [2024-06-28 01:02:16,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 1993 flow [2024-06-28 01:02:16,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 1915 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:16,976 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1574 flow [2024-06-28 01:02:16,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1574, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-06-28 01:02:16,977 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-28 01:02:16,977 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1574 flow [2024-06-28 01:02:16,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:16,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:16,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:16,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:02:16,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:16,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:16,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1866210224, now seen corresponding path program 1 times [2024-06-28 01:02:16,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:16,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194922240] [2024-06-28 01:02:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:16,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:17,049 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 01:02:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194922240] [2024-06-28 01:02:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194922240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:17,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819077707] [2024-06-28 01:02:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:17,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:17,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1574 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:17,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:17,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:17,396 INFO L124 PetriNetUnfolderBase]: 2008/3338 cut-off events. [2024-06-28 01:02:17,396 INFO L125 PetriNetUnfolderBase]: For 33513/33513 co-relation queries the response was YES. [2024-06-28 01:02:17,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17045 conditions, 3338 events. 2008/3338 cut-off events. For 33513/33513 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20638 event pairs, 470 based on Foata normal form. 2/3327 useless extension candidates. Maximal degree in co-relation 16992. Up to 2679 conditions per place. [2024-06-28 01:02:17,422 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 132 selfloop transitions, 34 changer transitions 0/181 dead transitions. [2024-06-28 01:02:17,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 2098 flow [2024-06-28 01:02:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-28 01:02:17,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851063829787234 [2024-06-28 01:02:17,425 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1574 flow. Second operand 5 states and 161 transitions. [2024-06-28 01:02:17,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 2098 flow [2024-06-28 01:02:17,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1984 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:17,470 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 1613 flow [2024-06-28 01:02:17,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-28 01:02:17,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 65 predicate places. [2024-06-28 01:02:17,471 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 1613 flow [2024-06-28 01:02:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:17,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:02:17,471 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:17,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1772289340, now seen corresponding path program 2 times [2024-06-28 01:02:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071960839] [2024-06-28 01:02:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:17,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:17,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071960839] [2024-06-28 01:02:17,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071960839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:17,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:17,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830920894] [2024-06-28 01:02:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:17,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:17,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:17,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:17,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 1613 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:17,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:17,903 INFO L124 PetriNetUnfolderBase]: 1980/3290 cut-off events. [2024-06-28 01:02:17,904 INFO L125 PetriNetUnfolderBase]: For 34971/34971 co-relation queries the response was YES. [2024-06-28 01:02:17,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16601 conditions, 3290 events. 1980/3290 cut-off events. For 34971/34971 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20431 event pairs, 486 based on Foata normal form. 4/3274 useless extension candidates. Maximal degree in co-relation 16551. Up to 2649 conditions per place. [2024-06-28 01:02:17,924 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 126 selfloop transitions, 33 changer transitions 0/174 dead transitions. [2024-06-28 01:02:17,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 2001 flow [2024-06-28 01:02:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-28 01:02:17,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-28 01:02:17,925 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 1613 flow. Second operand 5 states and 155 transitions. [2024-06-28 01:02:17,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 2001 flow [2024-06-28 01:02:17,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 174 transitions, 1942 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:17,960 INFO L231 Difference]: Finished difference. Result has 119 places, 158 transitions, 1629 flow [2024-06-28 01:02:17,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1629, PETRI_PLACES=119, PETRI_TRANSITIONS=158} [2024-06-28 01:02:17,961 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2024-06-28 01:02:17,961 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 158 transitions, 1629 flow [2024-06-28 01:02:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:17,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:17,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:17,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:02:17,961 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 01:02:17,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1731057653, now seen corresponding path program 1 times [2024-06-28 01:02:17,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:17,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593127078] [2024-06-28 01:02:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:17,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:18,049 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 01:02:18,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593127078] [2024-06-28 01:02:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593127078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:18,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571999327] [2024-06-28 01:02:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:18,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:18,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:18,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:18,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 1629 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:18,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:18,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:18,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:18,474 INFO L124 PetriNetUnfolderBase]: 2109/3601 cut-off events. [2024-06-28 01:02:18,475 INFO L125 PetriNetUnfolderBase]: For 39969/39969 co-relation queries the response was YES. [2024-06-28 01:02:18,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17950 conditions, 3601 events. 2109/3601 cut-off events. For 39969/39969 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22799 event pairs, 530 based on Foata normal form. 6/3572 useless extension candidates. Maximal degree in co-relation 17899. Up to 2796 conditions per place. [2024-06-28 01:02:18,500 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 177 selfloop transitions, 23 changer transitions 0/215 dead transitions. [2024-06-28 01:02:18,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 215 transitions, 2359 flow [2024-06-28 01:02:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 250 transitions. [2024-06-28 01:02:18,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2024-06-28 01:02:18,502 INFO L175 Difference]: Start difference. First operand has 119 places, 158 transitions, 1629 flow. Second operand 8 states and 250 transitions. [2024-06-28 01:02:18,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 215 transitions, 2359 flow [2024-06-28 01:02:18,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 215 transitions, 2237 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:18,552 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1662 flow [2024-06-28 01:02:18,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1662, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-28 01:02:18,553 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 71 predicate places. [2024-06-28 01:02:18,553 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1662 flow [2024-06-28 01:02:18,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:18,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:18,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:02:18,553 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 01:02:18,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1646834467, now seen corresponding path program 2 times [2024-06-28 01:02:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:18,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83608298] [2024-06-28 01:02:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83608298] [2024-06-28 01:02:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83608298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:18,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437425331] [2024-06-28 01:02:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:18,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:18,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:18,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1662 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:18,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:18,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:18,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:19,095 INFO L124 PetriNetUnfolderBase]: 2122/3578 cut-off events. [2024-06-28 01:02:19,095 INFO L125 PetriNetUnfolderBase]: For 42160/42160 co-relation queries the response was YES. [2024-06-28 01:02:19,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18386 conditions, 3578 events. 2122/3578 cut-off events. For 42160/42160 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22550 event pairs, 717 based on Foata normal form. 6/3549 useless extension candidates. Maximal degree in co-relation 18333. Up to 2964 conditions per place. [2024-06-28 01:02:19,120 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 175 selfloop transitions, 21 changer transitions 0/211 dead transitions. [2024-06-28 01:02:19,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 211 transitions, 2254 flow [2024-06-28 01:02:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-28 01:02:19,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462765957446809 [2024-06-28 01:02:19,121 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1662 flow. Second operand 8 states and 243 transitions. [2024-06-28 01:02:19,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 211 transitions, 2254 flow [2024-06-28 01:02:19,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2154 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:19,173 INFO L231 Difference]: Finished difference. Result has 126 places, 167 transitions, 1676 flow [2024-06-28 01:02:19,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1676, PETRI_PLACES=126, PETRI_TRANSITIONS=167} [2024-06-28 01:02:19,174 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 75 predicate places. [2024-06-28 01:02:19,174 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 167 transitions, 1676 flow [2024-06-28 01:02:19,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:19,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:02:19,174 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 01:02:19,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1646829507, now seen corresponding path program 1 times [2024-06-28 01:02:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284788601] [2024-06-28 01:02:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:19,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:19,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284788601] [2024-06-28 01:02:19,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284788601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:19,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:19,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:19,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178151533] [2024-06-28 01:02:19,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:19,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:19,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:19,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:19,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:19,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 167 transitions, 1676 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:19,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:19,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:19,626 INFO L124 PetriNetUnfolderBase]: 2166/3550 cut-off events. [2024-06-28 01:02:19,626 INFO L125 PetriNetUnfolderBase]: For 43096/43096 co-relation queries the response was YES. [2024-06-28 01:02:19,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18541 conditions, 3550 events. 2166/3550 cut-off events. For 43096/43096 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21902 event pairs, 380 based on Foata normal form. 3/3550 useless extension candidates. Maximal degree in co-relation 18486. Up to 3033 conditions per place. [2024-06-28 01:02:19,653 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 178 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-06-28 01:02:19,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 217 transitions, 2310 flow [2024-06-28 01:02:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-28 01:02:19,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-28 01:02:19,655 INFO L175 Difference]: Start difference. First operand has 126 places, 167 transitions, 1676 flow. Second operand 8 states and 244 transitions. [2024-06-28 01:02:19,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 217 transitions, 2310 flow [2024-06-28 01:02:19,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 217 transitions, 2242 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:19,716 INFO L231 Difference]: Finished difference. Result has 128 places, 174 transitions, 1761 flow [2024-06-28 01:02:19,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=128, PETRI_TRANSITIONS=174} [2024-06-28 01:02:19,717 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-06-28 01:02:19,717 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 174 transitions, 1761 flow [2024-06-28 01:02:19,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:19,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:19,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:02:19,718 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 01:02:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1365904163, now seen corresponding path program 3 times [2024-06-28 01:02:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355191547] [2024-06-28 01:02:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:19,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:19,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355191547] [2024-06-28 01:02:19,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355191547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:19,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:19,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:19,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087121116] [2024-06-28 01:02:19,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:19,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:19,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:19,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 174 transitions, 1761 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:19,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:19,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:19,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:20,233 INFO L124 PetriNetUnfolderBase]: 2275/3742 cut-off events. [2024-06-28 01:02:20,234 INFO L125 PetriNetUnfolderBase]: For 51590/51590 co-relation queries the response was YES. [2024-06-28 01:02:20,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19780 conditions, 3742 events. 2275/3742 cut-off events. For 51590/51590 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23361 event pairs, 419 based on Foata normal form. 14/3739 useless extension candidates. Maximal degree in co-relation 19724. Up to 2726 conditions per place. [2024-06-28 01:02:20,261 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 140 selfloop transitions, 65 changer transitions 0/220 dead transitions. [2024-06-28 01:02:20,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 220 transitions, 2471 flow [2024-06-28 01:02:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-28 01:02:20,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7051671732522796 [2024-06-28 01:02:20,262 INFO L175 Difference]: Start difference. First operand has 128 places, 174 transitions, 1761 flow. Second operand 7 states and 232 transitions. [2024-06-28 01:02:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 220 transitions, 2471 flow [2024-06-28 01:02:20,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2389 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:20,331 INFO L231 Difference]: Finished difference. Result has 131 places, 177 transitions, 1886 flow [2024-06-28 01:02:20,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1886, PETRI_PLACES=131, PETRI_TRANSITIONS=177} [2024-06-28 01:02:20,332 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-28 01:02:20,332 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 177 transitions, 1886 flow [2024-06-28 01:02:20,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:20,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:20,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:20,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:02:20,332 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 01:02:20,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1365899203, now seen corresponding path program 2 times [2024-06-28 01:02:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:20,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033291552] [2024-06-28 01:02:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:20,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:20,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033291552] [2024-06-28 01:02:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033291552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:20,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:20,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626132085] [2024-06-28 01:02:20,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:20,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:20,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:20,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:20,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:20,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 177 transitions, 1886 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:20,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:20,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:20,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:20,785 INFO L124 PetriNetUnfolderBase]: 2406/4025 cut-off events. [2024-06-28 01:02:20,786 INFO L125 PetriNetUnfolderBase]: For 58590/58590 co-relation queries the response was YES. [2024-06-28 01:02:20,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21853 conditions, 4025 events. 2406/4025 cut-off events. For 58590/58590 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25849 event pairs, 464 based on Foata normal form. 4/4004 useless extension candidates. Maximal degree in co-relation 21795. Up to 2540 conditions per place. [2024-06-28 01:02:20,814 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 127 selfloop transitions, 99 changer transitions 0/241 dead transitions. [2024-06-28 01:02:20,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 2992 flow [2024-06-28 01:02:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-06-28 01:02:20,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7203647416413373 [2024-06-28 01:02:20,816 INFO L175 Difference]: Start difference. First operand has 131 places, 177 transitions, 1886 flow. Second operand 7 states and 237 transitions. [2024-06-28 01:02:20,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 2992 flow [2024-06-28 01:02:20,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 241 transitions, 2825 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:20,959 INFO L231 Difference]: Finished difference. Result has 134 places, 198 transitions, 2223 flow [2024-06-28 01:02:20,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2223, PETRI_PLACES=134, PETRI_TRANSITIONS=198} [2024-06-28 01:02:20,960 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2024-06-28 01:02:20,960 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 198 transitions, 2223 flow [2024-06-28 01:02:20,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:20,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:20,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:20,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:02:20,961 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 01:02:20,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1359232963, now seen corresponding path program 3 times [2024-06-28 01:02:20,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290323913] [2024-06-28 01:02:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:21,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:21,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290323913] [2024-06-28 01:02:21,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290323913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:21,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:21,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372018312] [2024-06-28 01:02:21,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:21,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:21,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:21,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:21,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 198 transitions, 2223 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:21,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:21,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:21,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:21,527 INFO L124 PetriNetUnfolderBase]: 2395/3966 cut-off events. [2024-06-28 01:02:21,527 INFO L125 PetriNetUnfolderBase]: For 62444/62444 co-relation queries the response was YES. [2024-06-28 01:02:21,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22359 conditions, 3966 events. 2395/3966 cut-off events. For 62444/62444 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25272 event pairs, 440 based on Foata normal form. 4/3946 useless extension candidates. Maximal degree in co-relation 22299. Up to 2531 conditions per place. [2024-06-28 01:02:21,563 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 124 selfloop transitions, 101 changer transitions 0/240 dead transitions. [2024-06-28 01:02:21,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 240 transitions, 3031 flow [2024-06-28 01:02:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 235 transitions. [2024-06-28 01:02:21,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-06-28 01:02:21,564 INFO L175 Difference]: Start difference. First operand has 134 places, 198 transitions, 2223 flow. Second operand 7 states and 235 transitions. [2024-06-28 01:02:21,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 240 transitions, 3031 flow [2024-06-28 01:02:21,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 240 transitions, 2887 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-28 01:02:21,677 INFO L231 Difference]: Finished difference. Result has 141 places, 198 transitions, 2291 flow [2024-06-28 01:02:21,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2291, PETRI_PLACES=141, PETRI_TRANSITIONS=198} [2024-06-28 01:02:21,678 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-28 01:02:21,678 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 198 transitions, 2291 flow [2024-06-28 01:02:21,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:21,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:21,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:21,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:02:21,678 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 01:02:21,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:21,679 INFO L85 PathProgramCache]: Analyzing trace with hash -998220645, now seen corresponding path program 1 times [2024-06-28 01:02:21,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:21,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633577534] [2024-06-28 01:02:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:21,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:21,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:21,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633577534] [2024-06-28 01:02:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633577534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:21,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:21,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:21,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934957476] [2024-06-28 01:02:21,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:21,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:21,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:21,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:21,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 198 transitions, 2291 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:21,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:21,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:21,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:22,270 INFO L124 PetriNetUnfolderBase]: 2504/4117 cut-off events. [2024-06-28 01:02:22,270 INFO L125 PetriNetUnfolderBase]: For 71859/71859 co-relation queries the response was YES. [2024-06-28 01:02:22,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23648 conditions, 4117 events. 2504/4117 cut-off events. For 71859/71859 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 26141 event pairs, 444 based on Foata normal form. 14/4112 useless extension candidates. Maximal degree in co-relation 23585. Up to 3082 conditions per place. [2024-06-28 01:02:22,304 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 169 selfloop transitions, 59 changer transitions 0/243 dead transitions. [2024-06-28 01:02:22,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 243 transitions, 3025 flow [2024-06-28 01:02:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-28 01:02:22,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990881458966566 [2024-06-28 01:02:22,305 INFO L175 Difference]: Start difference. First operand has 141 places, 198 transitions, 2291 flow. Second operand 7 states and 230 transitions. [2024-06-28 01:02:22,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 243 transitions, 3025 flow [2024-06-28 01:02:22,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 243 transitions, 2819 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:22,387 INFO L231 Difference]: Finished difference. Result has 143 places, 201 transitions, 2286 flow [2024-06-28 01:02:22,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2286, PETRI_PLACES=143, PETRI_TRANSITIONS=201} [2024-06-28 01:02:22,388 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-28 01:02:22,388 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 201 transitions, 2286 flow [2024-06-28 01:02:22,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:22,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:22,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:02:22,388 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 01:02:22,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 225841853, now seen corresponding path program 4 times [2024-06-28 01:02:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244481480] [2024-06-28 01:02:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:22,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244481480] [2024-06-28 01:02:22,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244481480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:22,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:22,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:22,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108932854] [2024-06-28 01:02:22,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:22,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:22,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:22,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:22,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:22,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 201 transitions, 2286 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:22,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:22,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:22,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:22,947 INFO L124 PetriNetUnfolderBase]: 2588/4388 cut-off events. [2024-06-28 01:02:22,948 INFO L125 PetriNetUnfolderBase]: For 77111/77111 co-relation queries the response was YES. [2024-06-28 01:02:22,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24443 conditions, 4388 events. 2588/4388 cut-off events. For 77111/77111 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28699 event pairs, 552 based on Foata normal form. 14/4376 useless extension candidates. Maximal degree in co-relation 24379. Up to 3170 conditions per place. [2024-06-28 01:02:22,980 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 167 selfloop transitions, 61 changer transitions 0/243 dead transitions. [2024-06-28 01:02:22,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 243 transitions, 3026 flow [2024-06-28 01:02:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-28 01:02:22,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6899696048632219 [2024-06-28 01:02:22,982 INFO L175 Difference]: Start difference. First operand has 143 places, 201 transitions, 2286 flow. Second operand 7 states and 227 transitions. [2024-06-28 01:02:22,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 243 transitions, 3026 flow [2024-06-28 01:02:23,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 243 transitions, 2867 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:23,067 INFO L231 Difference]: Finished difference. Result has 145 places, 204 transitions, 2342 flow [2024-06-28 01:02:23,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2342, PETRI_PLACES=145, PETRI_TRANSITIONS=204} [2024-06-28 01:02:23,067 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-06-28 01:02:23,067 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 204 transitions, 2342 flow [2024-06-28 01:02:23,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:23,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:23,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:02:23,068 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 01:02:23,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1949882711, now seen corresponding path program 4 times [2024-06-28 01:02:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:23,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305546187] [2024-06-28 01:02:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:23,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:23,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305546187] [2024-06-28 01:02:23,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305546187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:23,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:23,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:23,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623053624] [2024-06-28 01:02:23,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:23,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:23,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 204 transitions, 2342 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:23,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:23,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:23,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:23,619 INFO L124 PetriNetUnfolderBase]: 2721/4503 cut-off events. [2024-06-28 01:02:23,619 INFO L125 PetriNetUnfolderBase]: For 81349/81349 co-relation queries the response was YES. [2024-06-28 01:02:23,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25922 conditions, 4503 events. 2721/4503 cut-off events. For 81349/81349 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29359 event pairs, 502 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 25857. Up to 2942 conditions per place. [2024-06-28 01:02:23,656 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 140 selfloop transitions, 106 changer transitions 0/261 dead transitions. [2024-06-28 01:02:23,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 261 transitions, 3520 flow [2024-06-28 01:02:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 234 transitions. [2024-06-28 01:02:23,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7112462006079028 [2024-06-28 01:02:23,657 INFO L175 Difference]: Start difference. First operand has 145 places, 204 transitions, 2342 flow. Second operand 7 states and 234 transitions. [2024-06-28 01:02:23,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 261 transitions, 3520 flow [2024-06-28 01:02:23,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 3347 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:23,771 INFO L231 Difference]: Finished difference. Result has 147 places, 222 transitions, 2695 flow [2024-06-28 01:02:23,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2695, PETRI_PLACES=147, PETRI_TRANSITIONS=222} [2024-06-28 01:02:23,771 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-28 01:02:23,771 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 222 transitions, 2695 flow [2024-06-28 01:02:23,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:23,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:23,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:23,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:02:23,772 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 01:02:23,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1549131229, now seen corresponding path program 5 times [2024-06-28 01:02:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:23,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232934965] [2024-06-28 01:02:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:23,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:23,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:23,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232934965] [2024-06-28 01:02:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232934965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:23,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:23,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:23,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446864117] [2024-06-28 01:02:23,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:23,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:23,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:23,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 222 transitions, 2695 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:23,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:23,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:23,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:24,348 INFO L124 PetriNetUnfolderBase]: 2712/4491 cut-off events. [2024-06-28 01:02:24,348 INFO L125 PetriNetUnfolderBase]: For 82643/82643 co-relation queries the response was YES. [2024-06-28 01:02:24,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25930 conditions, 4491 events. 2712/4491 cut-off events. For 82643/82643 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29253 event pairs, 502 based on Foata normal form. 4/4470 useless extension candidates. Maximal degree in co-relation 25864. Up to 2936 conditions per place. [2024-06-28 01:02:24,381 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 137 selfloop transitions, 107 changer transitions 0/259 dead transitions. [2024-06-28 01:02:24,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 259 transitions, 3477 flow [2024-06-28 01:02:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2024-06-28 01:02:24,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7021276595744681 [2024-06-28 01:02:24,382 INFO L175 Difference]: Start difference. First operand has 147 places, 222 transitions, 2695 flow. Second operand 7 states and 231 transitions. [2024-06-28 01:02:24,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 259 transitions, 3477 flow [2024-06-28 01:02:24,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 259 transitions, 3315 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-28 01:02:24,508 INFO L231 Difference]: Finished difference. Result has 153 places, 222 transitions, 2757 flow [2024-06-28 01:02:24,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2757, PETRI_PLACES=153, PETRI_TRANSITIONS=222} [2024-06-28 01:02:24,509 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 102 predicate places. [2024-06-28 01:02:24,509 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 222 transitions, 2757 flow [2024-06-28 01:02:24,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:24,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:24,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:24,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:02:24,509 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 01:02:24,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:24,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1785486079, now seen corresponding path program 6 times [2024-06-28 01:02:24,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:24,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362450256] [2024-06-28 01:02:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:24,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:24,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362450256] [2024-06-28 01:02:24,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362450256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:24,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:24,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:24,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115294992] [2024-06-28 01:02:24,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:24,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:24,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:24,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:24,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 222 transitions, 2757 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:24,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:24,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:24,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:25,064 INFO L124 PetriNetUnfolderBase]: 2703/4499 cut-off events. [2024-06-28 01:02:25,064 INFO L125 PetriNetUnfolderBase]: For 84856/84856 co-relation queries the response was YES. [2024-06-28 01:02:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26199 conditions, 4499 events. 2703/4499 cut-off events. For 84856/84856 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29361 event pairs, 493 based on Foata normal form. 4/4476 useless extension candidates. Maximal degree in co-relation 26131. Up to 2930 conditions per place. [2024-06-28 01:02:25,099 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 137 selfloop transitions, 106 changer transitions 0/258 dead transitions. [2024-06-28 01:02:25,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 258 transitions, 3495 flow [2024-06-28 01:02:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-28 01:02:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6960486322188449 [2024-06-28 01:02:25,102 INFO L175 Difference]: Start difference. First operand has 153 places, 222 transitions, 2757 flow. Second operand 7 states and 229 transitions. [2024-06-28 01:02:25,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 258 transitions, 3495 flow [2024-06-28 01:02:25,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 258 transitions, 3198 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:25,240 INFO L231 Difference]: Finished difference. Result has 154 places, 222 transitions, 2682 flow [2024-06-28 01:02:25,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2682, PETRI_PLACES=154, PETRI_TRANSITIONS=222} [2024-06-28 01:02:25,241 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-28 01:02:25,241 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 222 transitions, 2682 flow [2024-06-28 01:02:25,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:25,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:25,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:02:25,242 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 01:02:25,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash 87856445, now seen corresponding path program 2 times [2024-06-28 01:02:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478451775] [2024-06-28 01:02:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:25,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:25,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478451775] [2024-06-28 01:02:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478451775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:25,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110459910] [2024-06-28 01:02:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:25,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:25,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 222 transitions, 2682 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:25,812 INFO L124 PetriNetUnfolderBase]: 2822/4642 cut-off events. [2024-06-28 01:02:25,812 INFO L125 PetriNetUnfolderBase]: For 92762/92762 co-relation queries the response was YES. [2024-06-28 01:02:25,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26802 conditions, 4642 events. 2822/4642 cut-off events. For 92762/92762 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30090 event pairs, 474 based on Foata normal form. 14/4637 useless extension candidates. Maximal degree in co-relation 26734. Up to 3538 conditions per place. [2024-06-28 01:02:25,844 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 192 selfloop transitions, 57 changer transitions 0/264 dead transitions. [2024-06-28 01:02:25,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 264 transitions, 3478 flow [2024-06-28 01:02:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-28 01:02:25,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6930091185410334 [2024-06-28 01:02:25,845 INFO L175 Difference]: Start difference. First operand has 154 places, 222 transitions, 2682 flow. Second operand 7 states and 228 transitions. [2024-06-28 01:02:25,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 264 transitions, 3478 flow [2024-06-28 01:02:25,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 264 transitions, 3266 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:25,967 INFO L231 Difference]: Finished difference. Result has 155 places, 225 transitions, 2675 flow [2024-06-28 01:02:25,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2675, PETRI_PLACES=155, PETRI_TRANSITIONS=225} [2024-06-28 01:02:25,967 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 104 predicate places. [2024-06-28 01:02:25,968 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 225 transitions, 2675 flow [2024-06-28 01:02:25,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:25,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:25,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:25,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:02:25,968 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:25,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 372956315, now seen corresponding path program 3 times [2024-06-28 01:02:25,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:25,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752811616] [2024-06-28 01:02:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:25,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:26,038 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 01:02:26,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752811616] [2024-06-28 01:02:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752811616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:26,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:26,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:26,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107028718] [2024-06-28 01:02:26,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:26,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:26,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:26,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:26,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:26,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 225 transitions, 2675 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:26,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:26,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:26,580 INFO L124 PetriNetUnfolderBase]: 2941/4837 cut-off events. [2024-06-28 01:02:26,580 INFO L125 PetriNetUnfolderBase]: For 99823/99823 co-relation queries the response was YES. [2024-06-28 01:02:26,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27852 conditions, 4837 events. 2941/4837 cut-off events. For 99823/99823 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31677 event pairs, 491 based on Foata normal form. 14/4832 useless extension candidates. Maximal degree in co-relation 27783. Up to 3719 conditions per place. [2024-06-28 01:02:26,620 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 197 selfloop transitions, 56 changer transitions 0/268 dead transitions. [2024-06-28 01:02:26,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 268 transitions, 3551 flow [2024-06-28 01:02:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-28 01:02:26,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6930091185410334 [2024-06-28 01:02:26,622 INFO L175 Difference]: Start difference. First operand has 155 places, 225 transitions, 2675 flow. Second operand 7 states and 228 transitions. [2024-06-28 01:02:26,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 268 transitions, 3551 flow [2024-06-28 01:02:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 268 transitions, 3388 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:26,750 INFO L231 Difference]: Finished difference. Result has 157 places, 228 transitions, 2721 flow [2024-06-28 01:02:26,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2721, PETRI_PLACES=157, PETRI_TRANSITIONS=228} [2024-06-28 01:02:26,751 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-28 01:02:26,751 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 228 transitions, 2721 flow [2024-06-28 01:02:26,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:26,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:26,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:02:26,751 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:26,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1785793537, now seen corresponding path program 4 times [2024-06-28 01:02:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:26,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023839311] [2024-06-28 01:02:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:26,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:26,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023839311] [2024-06-28 01:02:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023839311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:26,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:26,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:02:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982544901] [2024-06-28 01:02:26,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:02:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:02:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:02:26,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:26,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 228 transitions, 2721 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:26,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:26,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:26,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:27,450 INFO L124 PetriNetUnfolderBase]: 3189/5273 cut-off events. [2024-06-28 01:02:27,451 INFO L125 PetriNetUnfolderBase]: For 112485/112485 co-relation queries the response was YES. [2024-06-28 01:02:27,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30161 conditions, 5273 events. 3189/5273 cut-off events. For 112485/112485 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35428 event pairs, 480 based on Foata normal form. 14/5268 useless extension candidates. Maximal degree in co-relation 30091. Up to 3426 conditions per place. [2024-06-28 01:02:27,496 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 200 selfloop transitions, 63 changer transitions 0/278 dead transitions. [2024-06-28 01:02:27,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 278 transitions, 3741 flow [2024-06-28 01:02:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2024-06-28 01:02:27,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7051671732522796 [2024-06-28 01:02:27,498 INFO L175 Difference]: Start difference. First operand has 157 places, 228 transitions, 2721 flow. Second operand 7 states and 232 transitions. [2024-06-28 01:02:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 278 transitions, 3741 flow [2024-06-28 01:02:27,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 278 transitions, 3574 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:27,684 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2829 flow [2024-06-28 01:02:27,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2829, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-06-28 01:02:27,684 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 109 predicate places. [2024-06-28 01:02:27,684 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2829 flow [2024-06-28 01:02:27,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:27,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:27,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:27,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:02:27,685 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 01:02:27,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:27,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1528096538, now seen corresponding path program 1 times [2024-06-28 01:02:27,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:27,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852719475] [2024-06-28 01:02:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:27,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852719475] [2024-06-28 01:02:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852719475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:27,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234735111] [2024-06-28 01:02:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:27,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:27,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 233 transitions, 2829 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:27,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:27,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:27,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:28,385 INFO L124 PetriNetUnfolderBase]: 3211/5305 cut-off events. [2024-06-28 01:02:28,386 INFO L125 PetriNetUnfolderBase]: For 113130/113130 co-relation queries the response was YES. [2024-06-28 01:02:28,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31173 conditions, 5305 events. 3211/5305 cut-off events. For 113130/113130 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35612 event pairs, 584 based on Foata normal form. 2/5287 useless extension candidates. Maximal degree in co-relation 31101. Up to 4452 conditions per place. [2024-06-28 01:02:28,436 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 204 selfloop transitions, 34 changer transitions 0/253 dead transitions. [2024-06-28 01:02:28,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 253 transitions, 3477 flow [2024-06-28 01:02:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 01:02:28,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6510638297872341 [2024-06-28 01:02:28,438 INFO L175 Difference]: Start difference. First operand has 160 places, 233 transitions, 2829 flow. Second operand 5 states and 153 transitions. [2024-06-28 01:02:28,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 253 transitions, 3477 flow [2024-06-28 01:02:28,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 253 transitions, 3336 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:28,649 INFO L231 Difference]: Finished difference. Result has 162 places, 237 transitions, 2835 flow [2024-06-28 01:02:28,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2835, PETRI_PLACES=162, PETRI_TRANSITIONS=237} [2024-06-28 01:02:28,650 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 111 predicate places. [2024-06-28 01:02:28,650 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 237 transitions, 2835 flow [2024-06-28 01:02:28,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:28,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:28,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:28,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:02:28,651 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 01:02:28,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1318945034, now seen corresponding path program 2 times [2024-06-28 01:02:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:28,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693251964] [2024-06-28 01:02:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:28,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:28,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:28,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693251964] [2024-06-28 01:02:28,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693251964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:28,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:28,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:28,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758724194] [2024-06-28 01:02:28,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:28,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:28,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 237 transitions, 2835 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:28,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:28,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:28,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:29,232 INFO L124 PetriNetUnfolderBase]: 3175/5236 cut-off events. [2024-06-28 01:02:29,232 INFO L125 PetriNetUnfolderBase]: For 110042/110042 co-relation queries the response was YES. [2024-06-28 01:02:29,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30564 conditions, 5236 events. 3175/5236 cut-off events. For 110042/110042 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35004 event pairs, 559 based on Foata normal form. 2/5223 useless extension candidates. Maximal degree in co-relation 30490. Up to 4396 conditions per place. [2024-06-28 01:02:29,277 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 203 selfloop transitions, 37 changer transitions 0/255 dead transitions. [2024-06-28 01:02:29,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3357 flow [2024-06-28 01:02:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-28 01:02:29,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638297872340425 [2024-06-28 01:02:29,278 INFO L175 Difference]: Start difference. First operand has 162 places, 237 transitions, 2835 flow. Second operand 5 states and 156 transitions. [2024-06-28 01:02:29,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3357 flow [2024-06-28 01:02:29,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 255 transitions, 3275 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 01:02:29,453 INFO L231 Difference]: Finished difference. Result has 164 places, 237 transitions, 2836 flow [2024-06-28 01:02:29,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2836, PETRI_PLACES=164, PETRI_TRANSITIONS=237} [2024-06-28 01:02:29,453 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-28 01:02:29,453 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 237 transitions, 2836 flow [2024-06-28 01:02:29,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:29,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:29,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:29,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 01:02:29,454 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 01:02:29,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:29,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1528106458, now seen corresponding path program 1 times [2024-06-28 01:02:29,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:29,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308926145] [2024-06-28 01:02:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:29,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:29,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308926145] [2024-06-28 01:02:29,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308926145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:29,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:29,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:29,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88926264] [2024-06-28 01:02:29,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:29,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:29,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:29,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:29,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 237 transitions, 2836 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:29,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:29,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:29,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:30,087 INFO L124 PetriNetUnfolderBase]: 3224/5328 cut-off events. [2024-06-28 01:02:30,087 INFO L125 PetriNetUnfolderBase]: For 118906/118906 co-relation queries the response was YES. [2024-06-28 01:02:30,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31076 conditions, 5328 events. 3224/5328 cut-off events. For 118906/118906 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35777 event pairs, 568 based on Foata normal form. 8/5317 useless extension candidates. Maximal degree in co-relation 31002. Up to 4411 conditions per place. [2024-06-28 01:02:30,130 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 204 selfloop transitions, 41 changer transitions 0/260 dead transitions. [2024-06-28 01:02:30,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3424 flow [2024-06-28 01:02:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:02:30,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418439716312057 [2024-06-28 01:02:30,131 INFO L175 Difference]: Start difference. First operand has 164 places, 237 transitions, 2836 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:02:30,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3424 flow [2024-06-28 01:02:30,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 3320 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:30,272 INFO L231 Difference]: Finished difference. Result has 165 places, 241 transitions, 2885 flow [2024-06-28 01:02:30,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2885, PETRI_PLACES=165, PETRI_TRANSITIONS=241} [2024-06-28 01:02:30,272 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 114 predicate places. [2024-06-28 01:02:30,272 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 241 transitions, 2885 flow [2024-06-28 01:02:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:30,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:30,273 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 01:02:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 01:02:30,273 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 01:02:30,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1879704817, now seen corresponding path program 1 times [2024-06-28 01:02:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:30,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632278313] [2024-06-28 01:02:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:30,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:30,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632278313] [2024-06-28 01:02:30,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632278313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:30,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:30,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089458695] [2024-06-28 01:02:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:30,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:30,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:30,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 241 transitions, 2885 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:30,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:30,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:30,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:30,946 INFO L124 PetriNetUnfolderBase]: 3211/5297 cut-off events. [2024-06-28 01:02:30,946 INFO L125 PetriNetUnfolderBase]: For 117376/117376 co-relation queries the response was YES. [2024-06-28 01:02:30,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 5297 events. 3211/5297 cut-off events. For 117376/117376 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35368 event pairs, 791 based on Foata normal form. 2/5288 useless extension candidates. Maximal degree in co-relation 31252. Up to 4605 conditions per place. [2024-06-28 01:02:30,992 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 244 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2024-06-28 01:02:30,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 277 transitions, 3495 flow [2024-06-28 01:02:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:02:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:02:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-28 01:02:30,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443768996960486 [2024-06-28 01:02:30,993 INFO L175 Difference]: Start difference. First operand has 165 places, 241 transitions, 2885 flow. Second operand 7 states and 212 transitions. [2024-06-28 01:02:30,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 277 transitions, 3495 flow [2024-06-28 01:02:31,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 277 transitions, 3362 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:31,181 INFO L231 Difference]: Finished difference. Result has 168 places, 241 transitions, 2796 flow [2024-06-28 01:02:31,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2796, PETRI_PLACES=168, PETRI_TRANSITIONS=241} [2024-06-28 01:02:31,181 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-28 01:02:31,182 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 241 transitions, 2796 flow [2024-06-28 01:02:31,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:31,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:31,182 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 01:02:31,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 01:02:31,182 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 01:02:31,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1332382995, now seen corresponding path program 2 times [2024-06-28 01:02:31,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:31,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499493845] [2024-06-28 01:02:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:31,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:31,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499493845] [2024-06-28 01:02:31,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499493845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:31,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:31,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047068722] [2024-06-28 01:02:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:31,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:31,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 241 transitions, 2796 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:31,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:31,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:31,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:31,836 INFO L124 PetriNetUnfolderBase]: 3247/5357 cut-off events. [2024-06-28 01:02:31,836 INFO L125 PetriNetUnfolderBase]: For 121688/121688 co-relation queries the response was YES. [2024-06-28 01:02:31,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31270 conditions, 5357 events. 3247/5357 cut-off events. For 121688/121688 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35884 event pairs, 551 based on Foata normal form. 2/5342 useless extension candidates. Maximal degree in co-relation 31194. Up to 4229 conditions per place. [2024-06-28 01:02:31,883 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 188 selfloop transitions, 72 changer transitions 0/275 dead transitions. [2024-06-28 01:02:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 275 transitions, 3696 flow [2024-06-28 01:02:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-28 01:02:31,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6773049645390071 [2024-06-28 01:02:31,884 INFO L175 Difference]: Start difference. First operand has 168 places, 241 transitions, 2796 flow. Second operand 6 states and 191 transitions. [2024-06-28 01:02:31,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 275 transitions, 3696 flow [2024-06-28 01:02:32,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 275 transitions, 3660 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:32,154 INFO L231 Difference]: Finished difference. Result has 168 places, 248 transitions, 3015 flow [2024-06-28 01:02:32,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3015, PETRI_PLACES=168, PETRI_TRANSITIONS=248} [2024-06-28 01:02:32,154 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 117 predicate places. [2024-06-28 01:02:32,154 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 248 transitions, 3015 flow [2024-06-28 01:02:32,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:32,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:32,155 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 01:02:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 01:02:32,155 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 01:02:32,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash 111392463, now seen corresponding path program 3 times [2024-06-28 01:02:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718669112] [2024-06-28 01:02:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718669112] [2024-06-28 01:02:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718669112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:32,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:32,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:32,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312077642] [2024-06-28 01:02:32,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:32,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:32,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:32,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:32,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:32,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:32,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 248 transitions, 3015 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:32,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:32,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:32,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:32,797 INFO L124 PetriNetUnfolderBase]: 3235/5345 cut-off events. [2024-06-28 01:02:32,797 INFO L125 PetriNetUnfolderBase]: For 128410/128410 co-relation queries the response was YES. [2024-06-28 01:02:32,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31579 conditions, 5345 events. 3235/5345 cut-off events. For 128410/128410 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36015 event pairs, 607 based on Foata normal form. 4/5316 useless extension candidates. Maximal degree in co-relation 31502. Up to 4221 conditions per place. [2024-06-28 01:02:32,843 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 188 selfloop transitions, 65 changer transitions 0/268 dead transitions. [2024-06-28 01:02:32,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3713 flow [2024-06-28 01:02:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 01:02:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-06-28 01:02:32,844 INFO L175 Difference]: Start difference. First operand has 168 places, 248 transitions, 3015 flow. Second operand 6 states and 185 transitions. [2024-06-28 01:02:32,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3713 flow [2024-06-28 01:02:33,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 268 transitions, 3611 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:33,061 INFO L231 Difference]: Finished difference. Result has 172 places, 248 transitions, 3051 flow [2024-06-28 01:02:33,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3051, PETRI_PLACES=172, PETRI_TRANSITIONS=248} [2024-06-28 01:02:33,062 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-28 01:02:33,062 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 248 transitions, 3051 flow [2024-06-28 01:02:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:33,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:33,063 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 01:02:33,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:02:33,063 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 01:02:33,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 305735469, now seen corresponding path program 1 times [2024-06-28 01:02:33,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:33,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456972621] [2024-06-28 01:02:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:33,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:33,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456972621] [2024-06-28 01:02:33,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456972621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:33,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086465863] [2024-06-28 01:02:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:33,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:33,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 248 transitions, 3051 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:33,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:33,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:33,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:33,722 INFO L124 PetriNetUnfolderBase]: 3246/5519 cut-off events. [2024-06-28 01:02:33,723 INFO L125 PetriNetUnfolderBase]: For 131201/131201 co-relation queries the response was YES. [2024-06-28 01:02:33,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31996 conditions, 5519 events. 3246/5519 cut-off events. For 131201/131201 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38032 event pairs, 1053 based on Foata normal form. 1/5481 useless extension candidates. Maximal degree in co-relation 31918. Up to 4656 conditions per place. [2024-06-28 01:02:33,773 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 241 selfloop transitions, 20 changer transitions 0/276 dead transitions. [2024-06-28 01:02:33,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 276 transitions, 3743 flow [2024-06-28 01:02:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 01:02:33,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2024-06-28 01:02:33,774 INFO L175 Difference]: Start difference. First operand has 172 places, 248 transitions, 3051 flow. Second operand 6 states and 182 transitions. [2024-06-28 01:02:33,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 276 transitions, 3743 flow [2024-06-28 01:02:34,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 276 transitions, 3469 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 01:02:34,019 INFO L231 Difference]: Finished difference. Result has 170 places, 251 transitions, 2859 flow [2024-06-28 01:02:34,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2859, PETRI_PLACES=170, PETRI_TRANSITIONS=251} [2024-06-28 01:02:34,020 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 119 predicate places. [2024-06-28 01:02:34,020 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 251 transitions, 2859 flow [2024-06-28 01:02:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:34,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:34,021 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 01:02:34,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 01:02:34,021 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 01:02:34,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1222370785, now seen corresponding path program 2 times [2024-06-28 01:02:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54995712] [2024-06-28 01:02:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:34,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54995712] [2024-06-28 01:02:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54995712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:34,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:02:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395035374] [2024-06-28 01:02:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:02:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:02:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:02:34,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:34,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 251 transitions, 2859 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:34,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:34,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:34,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:34,596 INFO L124 PetriNetUnfolderBase]: 3243/5325 cut-off events. [2024-06-28 01:02:34,596 INFO L125 PetriNetUnfolderBase]: For 129779/129779 co-relation queries the response was YES. [2024-06-28 01:02:34,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31156 conditions, 5325 events. 3243/5325 cut-off events. For 129779/129779 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35489 event pairs, 524 based on Foata normal form. 1/5312 useless extension candidates. Maximal degree in co-relation 31080. Up to 4653 conditions per place. [2024-06-28 01:02:34,643 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 231 selfloop transitions, 20 changer transitions 0/266 dead transitions. [2024-06-28 01:02:34,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 266 transitions, 3395 flow [2024-06-28 01:02:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:02:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:02:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 01:02:34,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-28 01:02:34,644 INFO L175 Difference]: Start difference. First operand has 170 places, 251 transitions, 2859 flow. Second operand 5 states and 150 transitions. [2024-06-28 01:02:34,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 266 transitions, 3395 flow [2024-06-28 01:02:34,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 266 transitions, 3345 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:34,853 INFO L231 Difference]: Finished difference. Result has 171 places, 251 transitions, 2855 flow [2024-06-28 01:02:34,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2855, PETRI_PLACES=171, PETRI_TRANSITIONS=251} [2024-06-28 01:02:34,853 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-28 01:02:34,853 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 251 transitions, 2855 flow [2024-06-28 01:02:34,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:34,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:34,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:34,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:02:34,854 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:34,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -922966610, now seen corresponding path program 1 times [2024-06-28 01:02:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:34,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65008760] [2024-06-28 01:02:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65008760] [2024-06-28 01:02:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65008760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:34,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:34,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643897405] [2024-06-28 01:02:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:34,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:34,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:34,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 251 transitions, 2855 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:34,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:34,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:34,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:35,697 INFO L124 PetriNetUnfolderBase]: 3567/5956 cut-off events. [2024-06-28 01:02:35,697 INFO L125 PetriNetUnfolderBase]: For 180443/180443 co-relation queries the response was YES. [2024-06-28 01:02:35,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36139 conditions, 5956 events. 3567/5956 cut-off events. For 180443/180443 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40852 event pairs, 950 based on Foata normal form. 18/5932 useless extension candidates. Maximal degree in co-relation 36062. Up to 4409 conditions per place. [2024-06-28 01:02:35,750 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 272 selfloop transitions, 30 changer transitions 0/317 dead transitions. [2024-06-28 01:02:35,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 317 transitions, 4003 flow [2024-06-28 01:02:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:02:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:02:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 284 transitions. [2024-06-28 01:02:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6713947990543735 [2024-06-28 01:02:35,751 INFO L175 Difference]: Start difference. First operand has 171 places, 251 transitions, 2855 flow. Second operand 9 states and 284 transitions. [2024-06-28 01:02:35,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 317 transitions, 4003 flow [2024-06-28 01:02:36,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 317 transitions, 3947 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:36,033 INFO L231 Difference]: Finished difference. Result has 176 places, 254 transitions, 2982 flow [2024-06-28 01:02:36,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2982, PETRI_PLACES=176, PETRI_TRANSITIONS=254} [2024-06-28 01:02:36,034 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-28 01:02:36,034 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 254 transitions, 2982 flow [2024-06-28 01:02:36,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:36,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:36,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:36,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:02:36,035 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:36,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:36,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1266940122, now seen corresponding path program 2 times [2024-06-28 01:02:36,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:36,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471399234] [2024-06-28 01:02:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:36,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:36,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:36,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471399234] [2024-06-28 01:02:36,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471399234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:36,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:36,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630766801] [2024-06-28 01:02:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:36,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:36,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:36,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:36,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 254 transitions, 2982 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:36,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:36,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:36,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:36,911 INFO L124 PetriNetUnfolderBase]: 3762/6287 cut-off events. [2024-06-28 01:02:36,912 INFO L125 PetriNetUnfolderBase]: For 208514/208514 co-relation queries the response was YES. [2024-06-28 01:02:36,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39444 conditions, 6287 events. 3762/6287 cut-off events. For 208514/208514 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43623 event pairs, 1196 based on Foata normal form. 18/6265 useless extension candidates. Maximal degree in co-relation 39367. Up to 4975 conditions per place. [2024-06-28 01:02:36,960 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 271 selfloop transitions, 30 changer transitions 0/316 dead transitions. [2024-06-28 01:02:36,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 316 transitions, 4132 flow [2024-06-28 01:02:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:02:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:02:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-28 01:02:36,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619385342789598 [2024-06-28 01:02:36,962 INFO L175 Difference]: Start difference. First operand has 176 places, 254 transitions, 2982 flow. Second operand 9 states and 280 transitions. [2024-06-28 01:02:36,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 316 transitions, 4132 flow [2024-06-28 01:02:37,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 316 transitions, 4023 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:37,269 INFO L231 Difference]: Finished difference. Result has 180 places, 258 transitions, 3112 flow [2024-06-28 01:02:37,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3112, PETRI_PLACES=180, PETRI_TRANSITIONS=258} [2024-06-28 01:02:37,269 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2024-06-28 01:02:37,269 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 258 transitions, 3112 flow [2024-06-28 01:02:37,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:37,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:37,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 01:02:37,270 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:37,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1271701722, now seen corresponding path program 3 times [2024-06-28 01:02:37,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:37,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391689900] [2024-06-28 01:02:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:37,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:37,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391689900] [2024-06-28 01:02:37,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391689900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:37,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:37,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730799126] [2024-06-28 01:02:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:37,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:37,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 258 transitions, 3112 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:37,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:37,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:37,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:38,057 INFO L124 PetriNetUnfolderBase]: 3716/6087 cut-off events. [2024-06-28 01:02:38,057 INFO L125 PetriNetUnfolderBase]: For 196738/196738 co-relation queries the response was YES. [2024-06-28 01:02:38,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37359 conditions, 6087 events. 3716/6087 cut-off events. For 196738/196738 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41448 event pairs, 625 based on Foata normal form. 24/6108 useless extension candidates. Maximal degree in co-relation 37280. Up to 5152 conditions per place. [2024-06-28 01:02:38,109 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 270 selfloop transitions, 26 changer transitions 0/311 dead transitions. [2024-06-28 01:02:38,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 311 transitions, 3928 flow [2024-06-28 01:02:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:02:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:02:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2024-06-28 01:02:38,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501182033096927 [2024-06-28 01:02:38,110 INFO L175 Difference]: Start difference. First operand has 180 places, 258 transitions, 3112 flow. Second operand 9 states and 275 transitions. [2024-06-28 01:02:38,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 311 transitions, 3928 flow [2024-06-28 01:02:38,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 311 transitions, 3774 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:38,489 INFO L231 Difference]: Finished difference. Result has 184 places, 258 transitions, 3018 flow [2024-06-28 01:02:38,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3018, PETRI_PLACES=184, PETRI_TRANSITIONS=258} [2024-06-28 01:02:38,489 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-28 01:02:38,489 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 258 transitions, 3018 flow [2024-06-28 01:02:38,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:38,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:38,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:38,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 01:02:38,490 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 01:02:38,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1291538367, now seen corresponding path program 1 times [2024-06-28 01:02:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684831462] [2024-06-28 01:02:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:38,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:38,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684831462] [2024-06-28 01:02:38,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684831462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:38,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:38,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979780549] [2024-06-28 01:02:38,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:38,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:38,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:38,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 258 transitions, 3018 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:38,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:38,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:39,256 INFO L124 PetriNetUnfolderBase]: 3752/6175 cut-off events. [2024-06-28 01:02:39,256 INFO L125 PetriNetUnfolderBase]: For 168717/168717 co-relation queries the response was YES. [2024-06-28 01:02:39,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36417 conditions, 6175 events. 3752/6175 cut-off events. For 168717/168717 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42472 event pairs, 662 based on Foata normal form. 2/6160 useless extension candidates. Maximal degree in co-relation 36336. Up to 5201 conditions per place. [2024-06-28 01:02:39,309 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 217 selfloop transitions, 55 changer transitions 0/287 dead transitions. [2024-06-28 01:02:39,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 287 transitions, 3789 flow [2024-06-28 01:02:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 01:02:39,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631205673758865 [2024-06-28 01:02:39,310 INFO L175 Difference]: Start difference. First operand has 184 places, 258 transitions, 3018 flow. Second operand 6 states and 187 transitions. [2024-06-28 01:02:39,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 287 transitions, 3789 flow [2024-06-28 01:02:39,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 287 transitions, 3729 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 01:02:39,638 INFO L231 Difference]: Finished difference. Result has 183 places, 265 transitions, 3219 flow [2024-06-28 01:02:39,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3219, PETRI_PLACES=183, PETRI_TRANSITIONS=265} [2024-06-28 01:02:39,638 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 132 predicate places. [2024-06-28 01:02:39,638 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 265 transitions, 3219 flow [2024-06-28 01:02:39,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:39,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:39,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:39,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:02:39,641 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:39,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash 339480072, now seen corresponding path program 4 times [2024-06-28 01:02:39,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:39,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117811162] [2024-06-28 01:02:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:39,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:39,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117811162] [2024-06-28 01:02:39,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117811162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:39,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:39,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976003230] [2024-06-28 01:02:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:39,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:39,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:39,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:39,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 265 transitions, 3219 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:39,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:39,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:40,577 INFO L124 PetriNetUnfolderBase]: 4088/6746 cut-off events. [2024-06-28 01:02:40,577 INFO L125 PetriNetUnfolderBase]: For 240265/240265 co-relation queries the response was YES. [2024-06-28 01:02:40,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39933 conditions, 6746 events. 4088/6746 cut-off events. For 240265/240265 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47150 event pairs, 772 based on Foata normal form. 50/6766 useless extension candidates. Maximal degree in co-relation 39850. Up to 4489 conditions per place. [2024-06-28 01:02:40,636 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 174 selfloop transitions, 129 changer transitions 0/318 dead transitions. [2024-06-28 01:02:40,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 318 transitions, 4317 flow [2024-06-28 01:02:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-28 01:02:40,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-28 01:02:40,642 INFO L175 Difference]: Start difference. First operand has 183 places, 265 transitions, 3219 flow. Second operand 8 states and 267 transitions. [2024-06-28 01:02:40,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 318 transitions, 4317 flow [2024-06-28 01:02:40,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 318 transitions, 4219 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:40,970 INFO L231 Difference]: Finished difference. Result has 187 places, 267 transitions, 3484 flow [2024-06-28 01:02:40,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3484, PETRI_PLACES=187, PETRI_TRANSITIONS=267} [2024-06-28 01:02:40,971 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-28 01:02:40,971 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 267 transitions, 3484 flow [2024-06-28 01:02:40,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:40,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:40,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:40,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:02:40,971 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:40,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash -879396612, now seen corresponding path program 5 times [2024-06-28 01:02:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:40,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961466598] [2024-06-28 01:02:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:40,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:41,042 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 01:02:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:41,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961466598] [2024-06-28 01:02:41,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961466598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:41,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116130927] [2024-06-28 01:02:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:41,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:41,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 267 transitions, 3484 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:41,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:41,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:41,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:41,990 INFO L124 PetriNetUnfolderBase]: 4794/7971 cut-off events. [2024-06-28 01:02:41,990 INFO L125 PetriNetUnfolderBase]: For 314067/314067 co-relation queries the response was YES. [2024-06-28 01:02:42,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49074 conditions, 7971 events. 4794/7971 cut-off events. For 314067/314067 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 57589 event pairs, 962 based on Foata normal form. 42/7975 useless extension candidates. Maximal degree in co-relation 48991. Up to 4417 conditions per place. [2024-06-28 01:02:42,062 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 180 selfloop transitions, 135 changer transitions 0/330 dead transitions. [2024-06-28 01:02:42,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 330 transitions, 4892 flow [2024-06-28 01:02:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 273 transitions. [2024-06-28 01:02:42,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.726063829787234 [2024-06-28 01:02:42,070 INFO L175 Difference]: Start difference. First operand has 187 places, 267 transitions, 3484 flow. Second operand 8 states and 273 transitions. [2024-06-28 01:02:42,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 330 transitions, 4892 flow [2024-06-28 01:02:42,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 330 transitions, 4571 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:42,591 INFO L231 Difference]: Finished difference. Result has 189 places, 271 transitions, 3624 flow [2024-06-28 01:02:42,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3624, PETRI_PLACES=189, PETRI_TRANSITIONS=271} [2024-06-28 01:02:42,591 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 138 predicate places. [2024-06-28 01:02:42,591 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 271 transitions, 3624 flow [2024-06-28 01:02:42,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:42,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:42,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 01:02:42,592 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:42,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash -552800548, now seen corresponding path program 6 times [2024-06-28 01:02:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155807405] [2024-06-28 01:02:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:42,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:42,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155807405] [2024-06-28 01:02:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155807405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:42,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:42,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415659486] [2024-06-28 01:02:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:42,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:42,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:42,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:42,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 271 transitions, 3624 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:42,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:42,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:42,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:43,557 INFO L124 PetriNetUnfolderBase]: 4697/7742 cut-off events. [2024-06-28 01:02:43,557 INFO L125 PetriNetUnfolderBase]: For 272430/272430 co-relation queries the response was YES. [2024-06-28 01:02:43,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45532 conditions, 7742 events. 4697/7742 cut-off events. For 272430/272430 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 55245 event pairs, 1017 based on Foata normal form. 50/7761 useless extension candidates. Maximal degree in co-relation 45448. Up to 5452 conditions per place. [2024-06-28 01:02:43,628 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 177 selfloop transitions, 131 changer transitions 0/323 dead transitions. [2024-06-28 01:02:43,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 323 transitions, 4744 flow [2024-06-28 01:02:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-28 01:02:43,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-28 01:02:43,630 INFO L175 Difference]: Start difference. First operand has 189 places, 271 transitions, 3624 flow. Second operand 8 states and 267 transitions. [2024-06-28 01:02:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 323 transitions, 4744 flow [2024-06-28 01:02:44,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 323 transitions, 4354 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:44,077 INFO L231 Difference]: Finished difference. Result has 192 places, 271 transitions, 3505 flow [2024-06-28 01:02:44,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=192, PETRI_TRANSITIONS=271} [2024-06-28 01:02:44,078 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 141 predicate places. [2024-06-28 01:02:44,078 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 271 transitions, 3505 flow [2024-06-28 01:02:44,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:44,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:44,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:44,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 01:02:44,078 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:44,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash -544222724, now seen corresponding path program 1 times [2024-06-28 01:02:44,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:44,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655986573] [2024-06-28 01:02:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:44,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:44,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655986573] [2024-06-28 01:02:44,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655986573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:44,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:44,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:44,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697906764] [2024-06-28 01:02:44,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:44,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:44,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 271 transitions, 3505 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:44,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:44,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:44,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:45,297 INFO L124 PetriNetUnfolderBase]: 5281/8694 cut-off events. [2024-06-28 01:02:45,298 INFO L125 PetriNetUnfolderBase]: For 304362/304362 co-relation queries the response was YES. [2024-06-28 01:02:45,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50101 conditions, 8694 events. 5281/8694 cut-off events. For 304362/304362 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 63553 event pairs, 1068 based on Foata normal form. 42/8701 useless extension candidates. Maximal degree in co-relation 50016. Up to 4647 conditions per place. [2024-06-28 01:02:45,363 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 178 selfloop transitions, 140 changer transitions 0/333 dead transitions. [2024-06-28 01:02:45,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 333 transitions, 4913 flow [2024-06-28 01:02:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2024-06-28 01:02:45,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2024-06-28 01:02:45,364 INFO L175 Difference]: Start difference. First operand has 192 places, 271 transitions, 3505 flow. Second operand 8 states and 272 transitions. [2024-06-28 01:02:45,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 333 transitions, 4913 flow [2024-06-28 01:02:45,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 333 transitions, 4633 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:45,847 INFO L231 Difference]: Finished difference. Result has 193 places, 274 transitions, 3646 flow [2024-06-28 01:02:45,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3646, PETRI_PLACES=193, PETRI_TRANSITIONS=274} [2024-06-28 01:02:45,848 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-06-28 01:02:45,848 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 274 transitions, 3646 flow [2024-06-28 01:02:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:45,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:45,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 01:02:45,849 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 01:02:45,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 286674343, now seen corresponding path program 2 times [2024-06-28 01:02:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:45,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919398272] [2024-06-28 01:02:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:45,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:45,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:45,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919398272] [2024-06-28 01:02:45,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919398272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:45,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:45,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:45,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748476301] [2024-06-28 01:02:45,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:45,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:45,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 274 transitions, 3646 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:45,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:45,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:45,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:46,836 INFO L124 PetriNetUnfolderBase]: 5317/8720 cut-off events. [2024-06-28 01:02:46,836 INFO L125 PetriNetUnfolderBase]: For 275865/275865 co-relation queries the response was YES. [2024-06-28 01:02:46,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50945 conditions, 8720 events. 5317/8720 cut-off events. For 275865/275865 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 63549 event pairs, 1306 based on Foata normal form. 2/8689 useless extension candidates. Maximal degree in co-relation 50859. Up to 7448 conditions per place. [2024-06-28 01:02:46,921 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 208 selfloop transitions, 79 changer transitions 0/302 dead transitions. [2024-06-28 01:02:46,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 302 transitions, 4663 flow [2024-06-28 01:02:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 01:02:46,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-06-28 01:02:46,922 INFO L175 Difference]: Start difference. First operand has 193 places, 274 transitions, 3646 flow. Second operand 6 states and 185 transitions. [2024-06-28 01:02:46,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 302 transitions, 4663 flow [2024-06-28 01:02:47,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 302 transitions, 4399 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:47,594 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 3663 flow [2024-06-28 01:02:47,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2024-06-28 01:02:47,595 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 144 predicate places. [2024-06-28 01:02:47,595 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 3663 flow [2024-06-28 01:02:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:47,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:47,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:47,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 01:02:47,595 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 01:02:47,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1755006603, now seen corresponding path program 3 times [2024-06-28 01:02:47,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:47,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681794123] [2024-06-28 01:02:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:47,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:47,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:47,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681794123] [2024-06-28 01:02:47,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681794123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:47,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:47,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:02:47,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316075044] [2024-06-28 01:02:47,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:47,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:02:47,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:02:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:02:47,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:47,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:47,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:47,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:47,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:48,665 INFO L124 PetriNetUnfolderBase]: 5311/8791 cut-off events. [2024-06-28 01:02:48,665 INFO L125 PetriNetUnfolderBase]: For 267981/267981 co-relation queries the response was YES. [2024-06-28 01:02:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50336 conditions, 8791 events. 5311/8791 cut-off events. For 267981/267981 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 64548 event pairs, 1309 based on Foata normal form. 2/8764 useless extension candidates. Maximal degree in co-relation 50248. Up to 7443 conditions per place. [2024-06-28 01:02:48,743 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 204 selfloop transitions, 83 changer transitions 0/302 dead transitions. [2024-06-28 01:02:48,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 302 transitions, 4571 flow [2024-06-28 01:02:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:02:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:02:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 01:02:48,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-28 01:02:48,744 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 3663 flow. Second operand 6 states and 186 transitions. [2024-06-28 01:02:48,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 302 transitions, 4571 flow [2024-06-28 01:02:49,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 302 transitions, 4411 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:49,275 INFO L231 Difference]: Finished difference. Result has 199 places, 281 transitions, 3676 flow [2024-06-28 01:02:49,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3676, PETRI_PLACES=199, PETRI_TRANSITIONS=281} [2024-06-28 01:02:49,275 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 148 predicate places. [2024-06-28 01:02:49,275 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 281 transitions, 3676 flow [2024-06-28 01:02:49,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:49,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:49,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:49,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 01:02:49,276 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:49,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 766637278, now seen corresponding path program 7 times [2024-06-28 01:02:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:49,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184248263] [2024-06-28 01:02:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:49,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184248263] [2024-06-28 01:02:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184248263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616234835] [2024-06-28 01:02:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:49,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:49,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 281 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:49,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:49,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:49,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:50,479 INFO L124 PetriNetUnfolderBase]: 5647/9266 cut-off events. [2024-06-28 01:02:50,479 INFO L125 PetriNetUnfolderBase]: For 344926/344926 co-relation queries the response was YES. [2024-06-28 01:02:50,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53530 conditions, 9266 events. 5647/9266 cut-off events. For 344926/344926 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 68205 event pairs, 1423 based on Foata normal form. 50/9285 useless extension candidates. Maximal degree in co-relation 53441. Up to 6918 conditions per place. [2024-06-28 01:02:50,569 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 191 selfloop transitions, 124 changer transitions 0/330 dead transitions. [2024-06-28 01:02:50,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 330 transitions, 4730 flow [2024-06-28 01:02:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 263 transitions. [2024-06-28 01:02:50,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.699468085106383 [2024-06-28 01:02:50,572 INFO L175 Difference]: Start difference. First operand has 199 places, 281 transitions, 3676 flow. Second operand 8 states and 263 transitions. [2024-06-28 01:02:50,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 330 transitions, 4730 flow [2024-06-28 01:02:51,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 330 transitions, 4525 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:51,221 INFO L231 Difference]: Finished difference. Result has 202 places, 283 transitions, 3828 flow [2024-06-28 01:02:51,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3828, PETRI_PLACES=202, PETRI_TRANSITIONS=283} [2024-06-28 01:02:51,222 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 151 predicate places. [2024-06-28 01:02:51,222 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 283 transitions, 3828 flow [2024-06-28 01:02:51,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:51,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:51,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 01:02:51,222 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:51,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 952152648, now seen corresponding path program 8 times [2024-06-28 01:02:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081890937] [2024-06-28 01:02:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:51,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:51,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081890937] [2024-06-28 01:02:51,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081890937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:51,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:51,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:51,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355074618] [2024-06-28 01:02:51,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:51,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:51,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 283 transitions, 3828 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:51,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:51,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:51,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,634 INFO L124 PetriNetUnfolderBase]: 5983/9846 cut-off events. [2024-06-28 01:02:52,634 INFO L125 PetriNetUnfolderBase]: For 381530/381530 co-relation queries the response was YES. [2024-06-28 01:02:52,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57460 conditions, 9846 events. 5983/9846 cut-off events. For 381530/381530 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 73265 event pairs, 1541 based on Foata normal form. 50/9853 useless extension candidates. Maximal degree in co-relation 57370. Up to 7446 conditions per place. [2024-06-28 01:02:52,742 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 192 selfloop transitions, 125 changer transitions 0/332 dead transitions. [2024-06-28 01:02:52,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 332 transitions, 4894 flow [2024-06-28 01:02:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2024-06-28 01:02:52,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2024-06-28 01:02:52,743 INFO L175 Difference]: Start difference. First operand has 202 places, 283 transitions, 3828 flow. Second operand 8 states and 262 transitions. [2024-06-28 01:02:52,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 332 transitions, 4894 flow [2024-06-28 01:02:53,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 332 transitions, 4573 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:53,605 INFO L231 Difference]: Finished difference. Result has 204 places, 285 transitions, 3870 flow [2024-06-28 01:02:53,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3870, PETRI_PLACES=204, PETRI_TRANSITIONS=285} [2024-06-28 01:02:53,606 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 153 predicate places. [2024-06-28 01:02:53,606 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 285 transitions, 3870 flow [2024-06-28 01:02:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:53,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:53,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 01:02:53,606 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:53,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 41179354, now seen corresponding path program 9 times [2024-06-28 01:02:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:53,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493979925] [2024-06-28 01:02:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:53,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493979925] [2024-06-28 01:02:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493979925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:53,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:53,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67098116] [2024-06-28 01:02:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:53,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:53,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 285 transitions, 3870 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:53,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:53,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:53,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:54,986 INFO L124 PetriNetUnfolderBase]: 6654/10905 cut-off events. [2024-06-28 01:02:54,986 INFO L125 PetriNetUnfolderBase]: For 457378/457378 co-relation queries the response was YES. [2024-06-28 01:02:55,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64976 conditions, 10905 events. 6654/10905 cut-off events. For 457378/457378 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 82360 event pairs, 1651 based on Foata normal form. 42/10916 useless extension candidates. Maximal degree in co-relation 64885. Up to 6820 conditions per place. [2024-06-28 01:02:55,093 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 196 selfloop transitions, 133 changer transitions 0/344 dead transitions. [2024-06-28 01:02:55,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 344 transitions, 5288 flow [2024-06-28 01:02:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 268 transitions. [2024-06-28 01:02:55,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7127659574468085 [2024-06-28 01:02:55,095 INFO L175 Difference]: Start difference. First operand has 204 places, 285 transitions, 3870 flow. Second operand 8 states and 268 transitions. [2024-06-28 01:02:55,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 344 transitions, 5288 flow [2024-06-28 01:02:55,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 344 transitions, 4961 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:55,987 INFO L231 Difference]: Finished difference. Result has 206 places, 289 transitions, 4028 flow [2024-06-28 01:02:55,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4028, PETRI_PLACES=206, PETRI_TRANSITIONS=289} [2024-06-28 01:02:55,987 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 155 predicate places. [2024-06-28 01:02:55,987 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 289 transitions, 4028 flow [2024-06-28 01:02:55,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 01:02:55,988 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:55,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1920172250, now seen corresponding path program 10 times [2024-06-28 01:02:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638045154] [2024-06-28 01:02:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:56,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:56,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638045154] [2024-06-28 01:02:56,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638045154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:56,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:56,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:56,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749859123] [2024-06-28 01:02:56,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:56,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:56,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:56,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:56,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:56,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 289 transitions, 4028 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:56,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:56,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:56,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:57,381 INFO L124 PetriNetUnfolderBase]: 6582/10789 cut-off events. [2024-06-28 01:02:57,381 INFO L125 PetriNetUnfolderBase]: For 402626/402626 co-relation queries the response was YES. [2024-06-28 01:02:57,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61163 conditions, 10789 events. 6582/10789 cut-off events. For 402626/402626 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 81301 event pairs, 1754 based on Foata normal form. 50/10808 useless extension candidates. Maximal degree in co-relation 61071. Up to 8353 conditions per place. [2024-06-28 01:02:57,481 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 197 selfloop transitions, 125 changer transitions 0/337 dead transitions. [2024-06-28 01:02:57,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 337 transitions, 5118 flow [2024-06-28 01:02:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2024-06-28 01:02:57,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2024-06-28 01:02:57,482 INFO L175 Difference]: Start difference. First operand has 206 places, 289 transitions, 4028 flow. Second operand 8 states and 262 transitions. [2024-06-28 01:02:57,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 337 transitions, 5118 flow [2024-06-28 01:02:58,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 337 transitions, 4792 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:58,599 INFO L231 Difference]: Finished difference. Result has 210 places, 289 transitions, 3961 flow [2024-06-28 01:02:58,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3961, PETRI_PLACES=210, PETRI_TRANSITIONS=289} [2024-06-28 01:02:58,600 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-06-28 01:02:58,600 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 289 transitions, 3961 flow [2024-06-28 01:02:58,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:58,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:58,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 01:02:58,601 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:58,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1222947480, now seen corresponding path program 2 times [2024-06-28 01:02:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:58,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590340352] [2024-06-28 01:02:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:58,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:58,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590340352] [2024-06-28 01:02:58,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590340352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:58,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:58,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166818980] [2024-06-28 01:02:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:58,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:02:58,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 289 transitions, 3961 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:58,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:58,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:02:58,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:59,997 INFO L124 PetriNetUnfolderBase]: 6855/11316 cut-off events. [2024-06-28 01:02:59,997 INFO L125 PetriNetUnfolderBase]: For 388094/388094 co-relation queries the response was YES. [2024-06-28 01:03:00,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62592 conditions, 11316 events. 6855/11316 cut-off events. For 388094/388094 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 86782 event pairs, 1773 based on Foata normal form. 42/11315 useless extension candidates. Maximal degree in co-relation 62498. Up to 7791 conditions per place. [2024-06-28 01:03:00,113 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 199 selfloop transitions, 130 changer transitions 0/344 dead transitions. [2024-06-28 01:03:00,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 344 transitions, 5107 flow [2024-06-28 01:03:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-28 01:03:00,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-28 01:03:00,114 INFO L175 Difference]: Start difference. First operand has 210 places, 289 transitions, 3961 flow. Second operand 8 states and 267 transitions. [2024-06-28 01:03:00,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 344 transitions, 5107 flow [2024-06-28 01:03:01,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 344 transitions, 4830 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 01:03:01,171 INFO L231 Difference]: Finished difference. Result has 211 places, 291 transitions, 4063 flow [2024-06-28 01:03:01,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4063, PETRI_PLACES=211, PETRI_TRANSITIONS=291} [2024-06-28 01:03:01,172 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-28 01:03:01,172 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 291 transitions, 4063 flow [2024-06-28 01:03:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:01,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:01,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 01:03:01,172 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:01,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash -325263990, now seen corresponding path program 3 times [2024-06-28 01:03:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326347207] [2024-06-28 01:03:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:01,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:01,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326347207] [2024-06-28 01:03:01,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326347207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:01,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:01,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:01,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389104999] [2024-06-28 01:03:01,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:01,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:01,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:01,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:01,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 291 transitions, 4063 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:01,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:02,752 INFO L124 PetriNetUnfolderBase]: 7150/11801 cut-off events. [2024-06-28 01:03:02,752 INFO L125 PetriNetUnfolderBase]: For 416595/416595 co-relation queries the response was YES. [2024-06-28 01:03:02,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65524 conditions, 11801 events. 7150/11801 cut-off events. For 416595/416595 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 91310 event pairs, 1883 based on Foata normal form. 42/11812 useless extension candidates. Maximal degree in co-relation 65429. Up to 8650 conditions per place. [2024-06-28 01:03:02,880 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 203 selfloop transitions, 129 changer transitions 0/347 dead transitions. [2024-06-28 01:03:02,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 347 transitions, 5333 flow [2024-06-28 01:03:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 267 transitions. [2024-06-28 01:03:02,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101063829787234 [2024-06-28 01:03:02,881 INFO L175 Difference]: Start difference. First operand has 211 places, 291 transitions, 4063 flow. Second operand 8 states and 267 transitions. [2024-06-28 01:03:02,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 347 transitions, 5333 flow [2024-06-28 01:03:03,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 347 transitions, 4986 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:03,746 INFO L231 Difference]: Finished difference. Result has 213 places, 293 transitions, 4097 flow [2024-06-28 01:03:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=213, PETRI_TRANSITIONS=293} [2024-06-28 01:03:03,747 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 162 predicate places. [2024-06-28 01:03:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 293 transitions, 4097 flow [2024-06-28 01:03:03,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:03,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:03,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 01:03:03,747 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:03,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 17034600, now seen corresponding path program 4 times [2024-06-28 01:03:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:03,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171062322] [2024-06-28 01:03:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:03,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171062322] [2024-06-28 01:03:03,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171062322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:03,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:03,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:03,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745862221] [2024-06-28 01:03:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:03,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:03,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 293 transitions, 4097 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:03,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:03,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:03,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:05,438 INFO L124 PetriNetUnfolderBase]: 7587/12572 cut-off events. [2024-06-28 01:03:05,438 INFO L125 PetriNetUnfolderBase]: For 452210/452210 co-relation queries the response was YES. [2024-06-28 01:03:05,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68427 conditions, 12572 events. 7587/12572 cut-off events. For 452210/452210 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 98954 event pairs, 1951 based on Foata normal form. 42/12583 useless extension candidates. Maximal degree in co-relation 68331. Up to 5945 conditions per place. [2024-06-28 01:03:05,552 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 199 selfloop transitions, 138 changer transitions 0/352 dead transitions. [2024-06-28 01:03:05,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 352 transitions, 5373 flow [2024-06-28 01:03:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 269 transitions. [2024-06-28 01:03:05,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154255319148937 [2024-06-28 01:03:05,553 INFO L175 Difference]: Start difference. First operand has 213 places, 293 transitions, 4097 flow. Second operand 8 states and 269 transitions. [2024-06-28 01:03:05,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 352 transitions, 5373 flow [2024-06-28 01:03:06,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 352 transitions, 5024 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:06,614 INFO L231 Difference]: Finished difference. Result has 214 places, 293 transitions, 3997 flow [2024-06-28 01:03:06,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3997, PETRI_PLACES=214, PETRI_TRANSITIONS=293} [2024-06-28 01:03:06,614 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 163 predicate places. [2024-06-28 01:03:06,614 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 293 transitions, 3997 flow [2024-06-28 01:03:06,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:06,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:06,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:06,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 01:03:06,615 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 01:03:06,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash 253448141, now seen corresponding path program 1 times [2024-06-28 01:03:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532335083] [2024-06-28 01:03:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:06,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532335083] [2024-06-28 01:03:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532335083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297344957] [2024-06-28 01:03:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:06,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:06,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 293 transitions, 3997 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:06,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:06,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:06,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:08,227 INFO L124 PetriNetUnfolderBase]: 7623/12585 cut-off events. [2024-06-28 01:03:08,227 INFO L125 PetriNetUnfolderBase]: For 392771/392771 co-relation queries the response was YES. [2024-06-28 01:03:08,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68236 conditions, 12585 events. 7623/12585 cut-off events. For 392771/392771 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 98811 event pairs, 2230 based on Foata normal form. 4/12567 useless extension candidates. Maximal degree in co-relation 68139. Up to 11384 conditions per place. [2024-06-28 01:03:08,363 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 261 selfloop transitions, 39 changer transitions 0/315 dead transitions. [2024-06-28 01:03:08,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 315 transitions, 4687 flow [2024-06-28 01:03:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:03:08,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-28 01:03:08,364 INFO L175 Difference]: Start difference. First operand has 214 places, 293 transitions, 3997 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:03:08,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 315 transitions, 4687 flow [2024-06-28 01:03:09,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 315 transitions, 4316 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:09,199 INFO L231 Difference]: Finished difference. Result has 214 places, 296 transitions, 3764 flow [2024-06-28 01:03:09,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3764, PETRI_PLACES=214, PETRI_TRANSITIONS=296} [2024-06-28 01:03:09,199 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 163 predicate places. [2024-06-28 01:03:09,199 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 296 transitions, 3764 flow [2024-06-28 01:03:09,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:09,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:09,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:09,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 01:03:09,200 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 01:03:09,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 673884999, now seen corresponding path program 2 times [2024-06-28 01:03:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268128855] [2024-06-28 01:03:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268128855] [2024-06-28 01:03:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268128855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:09,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:09,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400835047] [2024-06-28 01:03:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:09,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:09,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 296 transitions, 3764 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:09,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:09,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:09,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:10,692 INFO L124 PetriNetUnfolderBase]: 7407/12221 cut-off events. [2024-06-28 01:03:10,692 INFO L125 PetriNetUnfolderBase]: For 335979/335979 co-relation queries the response was YES. [2024-06-28 01:03:10,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63765 conditions, 12221 events. 7407/12221 cut-off events. For 335979/335979 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 95330 event pairs, 2087 based on Foata normal form. 4/12201 useless extension candidates. Maximal degree in co-relation 63667. Up to 10952 conditions per place. [2024-06-28 01:03:10,821 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 261 selfloop transitions, 43 changer transitions 0/319 dead transitions. [2024-06-28 01:03:10,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 319 transitions, 4470 flow [2024-06-28 01:03:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:03:10,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-28 01:03:10,822 INFO L175 Difference]: Start difference. First operand has 214 places, 296 transitions, 3764 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:03:10,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 319 transitions, 4470 flow [2024-06-28 01:03:11,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 319 transitions, 4354 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:11,757 INFO L231 Difference]: Finished difference. Result has 216 places, 299 transitions, 3800 flow [2024-06-28 01:03:11,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3800, PETRI_PLACES=216, PETRI_TRANSITIONS=299} [2024-06-28 01:03:11,757 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 165 predicate places. [2024-06-28 01:03:11,757 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 299 transitions, 3800 flow [2024-06-28 01:03:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:11,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:11,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:11,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 01:03:11,758 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:11,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:11,759 INFO L85 PathProgramCache]: Analyzing trace with hash 887866239, now seen corresponding path program 1 times [2024-06-28 01:03:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:11,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463099621] [2024-06-28 01:03:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:11,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:11,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:11,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463099621] [2024-06-28 01:03:11,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463099621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:11,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:11,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754807915] [2024-06-28 01:03:11,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:11,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:11,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:11,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 299 transitions, 3800 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:11,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:11,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:13,493 INFO L124 PetriNetUnfolderBase]: 7459/12862 cut-off events. [2024-06-28 01:03:13,493 INFO L125 PetriNetUnfolderBase]: For 348534/348534 co-relation queries the response was YES. [2024-06-28 01:03:13,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65181 conditions, 12862 events. 7459/12862 cut-off events. For 348534/348534 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 104161 event pairs, 2631 based on Foata normal form. 2/12845 useless extension candidates. Maximal degree in co-relation 65082. Up to 10890 conditions per place. [2024-06-28 01:03:13,598 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 259 selfloop transitions, 63 changer transitions 0/337 dead transitions. [2024-06-28 01:03:13,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 337 transitions, 4967 flow [2024-06-28 01:03:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-28 01:03:13,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-28 01:03:13,599 INFO L175 Difference]: Start difference. First operand has 216 places, 299 transitions, 3800 flow. Second operand 7 states and 217 transitions. [2024-06-28 01:03:13,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 337 transitions, 4967 flow [2024-06-28 01:03:14,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 337 transitions, 4837 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:14,542 INFO L231 Difference]: Finished difference. Result has 220 places, 307 transitions, 3926 flow [2024-06-28 01:03:14,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3926, PETRI_PLACES=220, PETRI_TRANSITIONS=307} [2024-06-28 01:03:14,543 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 169 predicate places. [2024-06-28 01:03:14,543 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 307 transitions, 3926 flow [2024-06-28 01:03:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:14,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:14,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:14,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 01:03:14,543 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:14,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -761002647, now seen corresponding path program 2 times [2024-06-28 01:03:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308990843] [2024-06-28 01:03:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:14,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:14,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308990843] [2024-06-28 01:03:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308990843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:14,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247845221] [2024-06-28 01:03:14,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:14,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:14,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:14,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:14,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 307 transitions, 3926 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:14,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:14,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:14,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:16,043 INFO L124 PetriNetUnfolderBase]: 7481/12439 cut-off events. [2024-06-28 01:03:16,043 INFO L125 PetriNetUnfolderBase]: For 357666/357666 co-relation queries the response was YES. [2024-06-28 01:03:16,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65124 conditions, 12439 events. 7481/12439 cut-off events. For 357666/357666 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 98030 event pairs, 2186 based on Foata normal form. 2/12408 useless extension candidates. Maximal degree in co-relation 65023. Up to 10910 conditions per place. [2024-06-28 01:03:16,172 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 247 selfloop transitions, 70 changer transitions 0/332 dead transitions. [2024-06-28 01:03:16,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 332 transitions, 5026 flow [2024-06-28 01:03:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 01:03:16,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-06-28 01:03:16,173 INFO L175 Difference]: Start difference. First operand has 220 places, 307 transitions, 3926 flow. Second operand 6 states and 185 transitions. [2024-06-28 01:03:16,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 332 transitions, 5026 flow [2024-06-28 01:03:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 332 transitions, 4907 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 01:03:17,121 INFO L231 Difference]: Finished difference. Result has 223 places, 311 transitions, 4020 flow [2024-06-28 01:03:17,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4020, PETRI_PLACES=223, PETRI_TRANSITIONS=311} [2024-06-28 01:03:17,121 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 172 predicate places. [2024-06-28 01:03:17,122 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 311 transitions, 4020 flow [2024-06-28 01:03:17,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:17,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:17,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:17,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 01:03:17,122 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:17,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1035475839, now seen corresponding path program 3 times [2024-06-28 01:03:17,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:17,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590608776] [2024-06-28 01:03:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:17,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:17,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:17,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590608776] [2024-06-28 01:03:17,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590608776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:17,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:17,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:17,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672051125] [2024-06-28 01:03:17,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:17,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:17,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:17,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:17,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:17,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 311 transitions, 4020 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:17,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:17,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:17,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:18,678 INFO L124 PetriNetUnfolderBase]: 7477/12354 cut-off events. [2024-06-28 01:03:18,678 INFO L125 PetriNetUnfolderBase]: For 363311/363311 co-relation queries the response was YES. [2024-06-28 01:03:18,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65021 conditions, 12354 events. 7477/12354 cut-off events. For 363311/363311 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 96689 event pairs, 2137 based on Foata normal form. 2/12318 useless extension candidates. Maximal degree in co-relation 64918. Up to 10908 conditions per place. [2024-06-28 01:03:18,804 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2024-06-28 01:03:18,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 332 transitions, 5060 flow [2024-06-28 01:03:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 01:03:18,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6524822695035462 [2024-06-28 01:03:18,805 INFO L175 Difference]: Start difference. First operand has 223 places, 311 transitions, 4020 flow. Second operand 6 states and 184 transitions. [2024-06-28 01:03:18,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 332 transitions, 5060 flow [2024-06-28 01:03:19,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 332 transitions, 4879 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:19,853 INFO L231 Difference]: Finished difference. Result has 225 places, 311 transitions, 3977 flow [2024-06-28 01:03:19,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3977, PETRI_PLACES=225, PETRI_TRANSITIONS=311} [2024-06-28 01:03:19,853 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 174 predicate places. [2024-06-28 01:03:19,853 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 311 transitions, 3977 flow [2024-06-28 01:03:19,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:19,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:19,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 01:03:19,854 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:19,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:19,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1565283353, now seen corresponding path program 4 times [2024-06-28 01:03:19,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:19,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430015801] [2024-06-28 01:03:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:19,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:19,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:19,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430015801] [2024-06-28 01:03:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430015801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:19,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:19,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623407411] [2024-06-28 01:03:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:19,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:19,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:19,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 311 transitions, 3977 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:19,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:21,429 INFO L124 PetriNetUnfolderBase]: 7499/12394 cut-off events. [2024-06-28 01:03:21,430 INFO L125 PetriNetUnfolderBase]: For 371244/371244 co-relation queries the response was YES. [2024-06-28 01:03:21,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65251 conditions, 12394 events. 7499/12394 cut-off events. For 371244/371244 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 96903 event pairs, 2115 based on Foata normal form. 2/12373 useless extension candidates. Maximal degree in co-relation 65149. Up to 10928 conditions per place. [2024-06-28 01:03:21,568 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 71 changer transitions 0/341 dead transitions. [2024-06-28 01:03:21,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 4998 flow [2024-06-28 01:03:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 01:03:21,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-28 01:03:21,569 INFO L175 Difference]: Start difference. First operand has 225 places, 311 transitions, 3977 flow. Second operand 6 states and 189 transitions. [2024-06-28 01:03:21,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 4998 flow [2024-06-28 01:03:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 341 transitions, 4781 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 01:03:22,823 INFO L231 Difference]: Finished difference. Result has 224 places, 315 transitions, 3979 flow [2024-06-28 01:03:22,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3979, PETRI_PLACES=224, PETRI_TRANSITIONS=315} [2024-06-28 01:03:22,825 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 173 predicate places. [2024-06-28 01:03:22,825 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 315 transitions, 3979 flow [2024-06-28 01:03:22,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:22,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:22,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:22,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 01:03:22,825 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:22,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:22,826 INFO L85 PathProgramCache]: Analyzing trace with hash -634508293, now seen corresponding path program 5 times [2024-06-28 01:03:22,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:22,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191730557] [2024-06-28 01:03:22,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:22,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:22,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:22,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191730557] [2024-06-28 01:03:22,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191730557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:22,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:22,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:22,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681671964] [2024-06-28 01:03:22,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:22,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:22,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:22,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 315 transitions, 3979 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:22,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:22,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:22,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:24,361 INFO L124 PetriNetUnfolderBase]: 7521/12432 cut-off events. [2024-06-28 01:03:24,361 INFO L125 PetriNetUnfolderBase]: For 380166/380166 co-relation queries the response was YES. [2024-06-28 01:03:24,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65478 conditions, 12432 events. 7521/12432 cut-off events. For 380166/380166 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 97161 event pairs, 2115 based on Foata normal form. 2/12411 useless extension candidates. Maximal degree in co-relation 65378. Up to 10948 conditions per place. [2024-06-28 01:03:24,491 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 75 changer transitions 0/342 dead transitions. [2024-06-28 01:03:24,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 342 transitions, 5000 flow [2024-06-28 01:03:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 01:03:24,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-28 01:03:24,492 INFO L175 Difference]: Start difference. First operand has 224 places, 315 transitions, 3979 flow. Second operand 6 states and 186 transitions. [2024-06-28 01:03:24,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 342 transitions, 5000 flow [2024-06-28 01:03:25,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 342 transitions, 4884 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 01:03:25,419 INFO L231 Difference]: Finished difference. Result has 227 places, 319 transitions, 4089 flow [2024-06-28 01:03:25,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4089, PETRI_PLACES=227, PETRI_TRANSITIONS=319} [2024-06-28 01:03:25,419 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 176 predicate places. [2024-06-28 01:03:25,419 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 319 transitions, 4089 flow [2024-06-28 01:03:25,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:25,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:25,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:25,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 01:03:25,420 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:25,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -378007783, now seen corresponding path program 6 times [2024-06-28 01:03:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:25,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334086699] [2024-06-28 01:03:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:25,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334086699] [2024-06-28 01:03:25,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334086699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:25,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:25,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617158923] [2024-06-28 01:03:25,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:25,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:25,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 319 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:25,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:25,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:25,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:27,106 INFO L124 PetriNetUnfolderBase]: 7454/12305 cut-off events. [2024-06-28 01:03:27,106 INFO L125 PetriNetUnfolderBase]: For 387755/387755 co-relation queries the response was YES. [2024-06-28 01:03:27,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64993 conditions, 12305 events. 7454/12305 cut-off events. For 387755/387755 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 95965 event pairs, 2119 based on Foata normal form. 2/12277 useless extension candidates. Maximal degree in co-relation 64892. Up to 10822 conditions per place. [2024-06-28 01:03:27,240 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 247 selfloop transitions, 76 changer transitions 0/338 dead transitions. [2024-06-28 01:03:27,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 338 transitions, 4903 flow [2024-06-28 01:03:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 01:03:27,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-28 01:03:27,241 INFO L175 Difference]: Start difference. First operand has 227 places, 319 transitions, 4089 flow. Second operand 6 states and 180 transitions. [2024-06-28 01:03:27,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 338 transitions, 4903 flow [2024-06-28 01:03:28,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 4790 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 01:03:28,286 INFO L231 Difference]: Finished difference. Result has 230 places, 319 transitions, 4135 flow [2024-06-28 01:03:28,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4135, PETRI_PLACES=230, PETRI_TRANSITIONS=319} [2024-06-28 01:03:28,286 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 179 predicate places. [2024-06-28 01:03:28,286 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 319 transitions, 4135 flow [2024-06-28 01:03:28,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:28,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:28,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 01:03:28,287 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:28,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash -377999847, now seen corresponding path program 1 times [2024-06-28 01:03:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:28,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973809518] [2024-06-28 01:03:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973809518] [2024-06-28 01:03:28,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973809518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:28,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:28,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:28,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254776997] [2024-06-28 01:03:28,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:28,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:28,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:28,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:28,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 319 transitions, 4135 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:28,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:28,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:28,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:29,774 INFO L124 PetriNetUnfolderBase]: 7490/12347 cut-off events. [2024-06-28 01:03:29,774 INFO L125 PetriNetUnfolderBase]: For 403252/403252 co-relation queries the response was YES. [2024-06-28 01:03:29,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65587 conditions, 12347 events. 7490/12347 cut-off events. For 403252/403252 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 96101 event pairs, 2062 based on Foata normal form. 4/12329 useless extension candidates. Maximal degree in co-relation 65485. Up to 11123 conditions per place. [2024-06-28 01:03:29,895 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 289 selfloop transitions, 37 changer transitions 0/341 dead transitions. [2024-06-28 01:03:29,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 341 transitions, 4885 flow [2024-06-28 01:03:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 01:03:29,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-28 01:03:29,896 INFO L175 Difference]: Start difference. First operand has 230 places, 319 transitions, 4135 flow. Second operand 6 states and 177 transitions. [2024-06-28 01:03:29,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 341 transitions, 4885 flow [2024-06-28 01:03:30,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 341 transitions, 4538 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-28 01:03:30,915 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 3930 flow [2024-06-28 01:03:30,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3930, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-28 01:03:30,916 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 176 predicate places. [2024-06-28 01:03:30,916 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 3930 flow [2024-06-28 01:03:30,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:30,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:30,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 01:03:30,916 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:30,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash -368476647, now seen corresponding path program 2 times [2024-06-28 01:03:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:30,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096901457] [2024-06-28 01:03:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:30,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096901457] [2024-06-28 01:03:30,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096901457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:30,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:30,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:30,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688920068] [2024-06-28 01:03:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:30,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:30,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:30,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:30,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 3930 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:30,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:30,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:30,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:32,447 INFO L124 PetriNetUnfolderBase]: 7549/12444 cut-off events. [2024-06-28 01:03:32,447 INFO L125 PetriNetUnfolderBase]: For 415303/415303 co-relation queries the response was YES. [2024-06-28 01:03:32,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66252 conditions, 12444 events. 7549/12444 cut-off events. For 415303/415303 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 97074 event pairs, 2051 based on Foata normal form. 4/12426 useless extension candidates. Maximal degree in co-relation 66150. Up to 11082 conditions per place. [2024-06-28 01:03:32,574 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 288 selfloop transitions, 46 changer transitions 0/349 dead transitions. [2024-06-28 01:03:32,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 349 transitions, 4898 flow [2024-06-28 01:03:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 01:03:32,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2024-06-28 01:03:32,575 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 3930 flow. Second operand 6 states and 179 transitions. [2024-06-28 01:03:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 349 transitions, 4898 flow [2024-06-28 01:03:33,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 349 transitions, 4778 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:33,638 INFO L231 Difference]: Finished difference. Result has 229 places, 328 transitions, 4038 flow [2024-06-28 01:03:33,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4038, PETRI_PLACES=229, PETRI_TRANSITIONS=328} [2024-06-28 01:03:33,638 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 178 predicate places. [2024-06-28 01:03:33,638 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 328 transitions, 4038 flow [2024-06-28 01:03:33,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:33,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:33,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 01:03:33,639 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:33,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -634500357, now seen corresponding path program 3 times [2024-06-28 01:03:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:33,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116446370] [2024-06-28 01:03:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:33,702 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 01:03:33,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116446370] [2024-06-28 01:03:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116446370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:33,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:33,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228403275] [2024-06-28 01:03:33,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:33,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:33,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 328 transitions, 4038 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:33,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:33,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:33,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:35,201 INFO L124 PetriNetUnfolderBase]: 7539/12417 cut-off events. [2024-06-28 01:03:35,201 INFO L125 PetriNetUnfolderBase]: For 417060/417060 co-relation queries the response was YES. [2024-06-28 01:03:35,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66089 conditions, 12417 events. 7539/12417 cut-off events. For 417060/417060 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 96554 event pairs, 2044 based on Foata normal form. 4/12404 useless extension candidates. Maximal degree in co-relation 65986. Up to 11194 conditions per place. [2024-06-28 01:03:35,334 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 295 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2024-06-28 01:03:35,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 350 transitions, 4758 flow [2024-06-28 01:03:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:03:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:03:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:03:35,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6418439716312057 [2024-06-28 01:03:35,335 INFO L175 Difference]: Start difference. First operand has 229 places, 328 transitions, 4038 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:03:35,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 350 transitions, 4758 flow [2024-06-28 01:03:36,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 4616 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-28 01:03:36,185 INFO L231 Difference]: Finished difference. Result has 233 places, 328 transitions, 3982 flow [2024-06-28 01:03:36,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3982, PETRI_PLACES=233, PETRI_TRANSITIONS=328} [2024-06-28 01:03:36,186 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-28 01:03:36,186 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 328 transitions, 3982 flow [2024-06-28 01:03:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:36,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:36,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 01:03:36,186 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:36,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash -766110383, now seen corresponding path program 1 times [2024-06-28 01:03:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322084805] [2024-06-28 01:03:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322084805] [2024-06-28 01:03:36,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322084805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:36,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:36,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:03:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177967456] [2024-06-28 01:03:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:03:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:03:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:03:36,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 47 [2024-06-28 01:03:36,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 328 transitions, 3982 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:36,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:36,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 47 [2024-06-28 01:03:36,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:37,882 INFO L124 PetriNetUnfolderBase]: 6369/13578 cut-off events. [2024-06-28 01:03:37,882 INFO L125 PetriNetUnfolderBase]: For 154354/154997 co-relation queries the response was YES. [2024-06-28 01:03:37,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48330 conditions, 13578 events. 6369/13578 cut-off events. For 154354/154997 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 134638 event pairs, 1177 based on Foata normal form. 656/13491 useless extension candidates. Maximal degree in co-relation 48225. Up to 4983 conditions per place. [2024-06-28 01:03:38,022 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 30 selfloop transitions, 89 changer transitions 0/342 dead transitions. [2024-06-28 01:03:38,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 342 transitions, 4276 flow [2024-06-28 01:03:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:03:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:03:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-06-28 01:03:38,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7712765957446809 [2024-06-28 01:03:38,023 INFO L175 Difference]: Start difference. First operand has 233 places, 328 transitions, 3982 flow. Second operand 4 states and 145 transitions. [2024-06-28 01:03:38,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 342 transitions, 4276 flow [2024-06-28 01:03:38,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 4175 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:38,470 INFO L231 Difference]: Finished difference. Result has 233 places, 329 transitions, 4243 flow [2024-06-28 01:03:38,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4243, PETRI_PLACES=233, PETRI_TRANSITIONS=329} [2024-06-28 01:03:38,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-28 01:03:38,471 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 329 transitions, 4243 flow [2024-06-28 01:03:38,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:38,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 01:03:38,471 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:38,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1373449932, now seen corresponding path program 1 times [2024-06-28 01:03:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:38,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035798509] [2024-06-28 01:03:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035798509] [2024-06-28 01:03:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035798509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:38,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238663528] [2024-06-28 01:03:38,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:38,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:38,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:38,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:38,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:38,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:38,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 329 transitions, 4243 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:38,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:38,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:38,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:40,349 INFO L124 PetriNetUnfolderBase]: 7900/13748 cut-off events. [2024-06-28 01:03:40,349 INFO L125 PetriNetUnfolderBase]: For 445184/445184 co-relation queries the response was YES. [2024-06-28 01:03:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72309 conditions, 13748 events. 7900/13748 cut-off events. For 445184/445184 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 113641 event pairs, 3439 based on Foata normal form. 4/13276 useless extension candidates. Maximal degree in co-relation 72202. Up to 12054 conditions per place. [2024-06-28 01:03:40,493 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 325 selfloop transitions, 28 changer transitions 0/369 dead transitions. [2024-06-28 01:03:40,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 369 transitions, 5212 flow [2024-06-28 01:03:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-28 01:03:40,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 01:03:40,494 INFO L175 Difference]: Start difference. First operand has 233 places, 329 transitions, 4243 flow. Second operand 8 states and 235 transitions. [2024-06-28 01:03:40,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 369 transitions, 5212 flow [2024-06-28 01:03:41,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 369 transitions, 5122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:03:41,438 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 4250 flow [2024-06-28 01:03:41,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4250, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-06-28 01:03:41,439 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-06-28 01:03:41,439 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 4250 flow [2024-06-28 01:03:41,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:41,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:41,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:41,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 01:03:41,439 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:41,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1382973132, now seen corresponding path program 2 times [2024-06-28 01:03:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11150906] [2024-06-28 01:03:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:41,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11150906] [2024-06-28 01:03:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11150906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:41,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:41,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:41,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771121414] [2024-06-28 01:03:41,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:41,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:41,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:41,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:41,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 4250 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:41,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:41,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:41,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:43,265 INFO L124 PetriNetUnfolderBase]: 7880/13592 cut-off events. [2024-06-28 01:03:43,265 INFO L125 PetriNetUnfolderBase]: For 443047/443047 co-relation queries the response was YES. [2024-06-28 01:03:43,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72121 conditions, 13592 events. 7880/13592 cut-off events. For 443047/443047 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 111569 event pairs, 3668 based on Foata normal form. 4/13120 useless extension candidates. Maximal degree in co-relation 72013. Up to 12228 conditions per place. [2024-06-28 01:03:43,408 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 325 selfloop transitions, 21 changer transitions 0/362 dead transitions. [2024-06-28 01:03:43,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 362 transitions, 5020 flow [2024-06-28 01:03:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:03:43,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037234042553191 [2024-06-28 01:03:43,409 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 4250 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:03:43,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 362 transitions, 5020 flow [2024-06-28 01:03:44,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 362 transitions, 4965 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:44,687 INFO L231 Difference]: Finished difference. Result has 242 places, 332 transitions, 4243 flow [2024-06-28 01:03:44,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4243, PETRI_PLACES=242, PETRI_TRANSITIONS=332} [2024-06-28 01:03:44,687 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-06-28 01:03:44,688 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 332 transitions, 4243 flow [2024-06-28 01:03:44,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:44,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:44,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:44,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 01:03:44,688 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:44,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1657240172, now seen corresponding path program 1 times [2024-06-28 01:03:44,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437154105] [2024-06-28 01:03:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:44,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:44,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:44,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437154105] [2024-06-28 01:03:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437154105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:44,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874164548] [2024-06-28 01:03:44,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:44,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:44,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:44,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 332 transitions, 4243 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:44,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:44,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:44,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:46,739 INFO L124 PetriNetUnfolderBase]: 7886/13615 cut-off events. [2024-06-28 01:03:46,740 INFO L125 PetriNetUnfolderBase]: For 447592/447636 co-relation queries the response was YES. [2024-06-28 01:03:46,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72230 conditions, 13615 events. 7886/13615 cut-off events. For 447592/447636 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 111946 event pairs, 3655 based on Foata normal form. 20/13168 useless extension candidates. Maximal degree in co-relation 72121. Up to 12045 conditions per place. [2024-06-28 01:03:46,859 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 258 selfloop transitions, 87 changer transitions 0/361 dead transitions. [2024-06-28 01:03:46,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 361 transitions, 5456 flow [2024-06-28 01:03:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-28 01:03:46,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6474164133738601 [2024-06-28 01:03:46,860 INFO L175 Difference]: Start difference. First operand has 242 places, 332 transitions, 4243 flow. Second operand 7 states and 213 transitions. [2024-06-28 01:03:46,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 361 transitions, 5456 flow [2024-06-28 01:03:48,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 361 transitions, 5384 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 01:03:48,123 INFO L231 Difference]: Finished difference. Result has 241 places, 335 transitions, 4396 flow [2024-06-28 01:03:48,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4171, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=241, PETRI_TRANSITIONS=335} [2024-06-28 01:03:48,124 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 190 predicate places. [2024-06-28 01:03:48,124 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 335 transitions, 4396 flow [2024-06-28 01:03:48,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:48,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:48,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:48,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 01:03:48,124 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:48,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:48,125 INFO L85 PathProgramCache]: Analyzing trace with hash -519771540, now seen corresponding path program 2 times [2024-06-28 01:03:48,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:48,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712528272] [2024-06-28 01:03:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712528272] [2024-06-28 01:03:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712528272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237749646] [2024-06-28 01:03:48,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:48,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:48,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 335 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:48,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:48,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:48,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:49,912 INFO L124 PetriNetUnfolderBase]: 7892/13623 cut-off events. [2024-06-28 01:03:49,913 INFO L125 PetriNetUnfolderBase]: For 458642/458686 co-relation queries the response was YES. [2024-06-28 01:03:50,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72626 conditions, 13623 events. 7892/13623 cut-off events. For 458642/458686 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 112119 event pairs, 3689 based on Foata normal form. 20/13175 useless extension candidates. Maximal degree in co-relation 72516. Up to 12050 conditions per place. [2024-06-28 01:03:50,061 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 90 changer transitions 0/358 dead transitions. [2024-06-28 01:03:50,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 358 transitions, 5593 flow [2024-06-28 01:03:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:03:50,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-28 01:03:50,062 INFO L175 Difference]: Start difference. First operand has 241 places, 335 transitions, 4396 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:03:50,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 358 transitions, 5593 flow [2024-06-28 01:03:51,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 358 transitions, 5444 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:51,859 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 4478 flow [2024-06-28 01:03:51,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4478, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2024-06-28 01:03:51,859 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-06-28 01:03:51,859 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 4478 flow [2024-06-28 01:03:51,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:51,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:51,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:51,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 01:03:51,860 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:51,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash -519774516, now seen corresponding path program 3 times [2024-06-28 01:03:51,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086982940] [2024-06-28 01:03:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:51,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:51,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086982940] [2024-06-28 01:03:51,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086982940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:51,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:51,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:51,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712162816] [2024-06-28 01:03:51,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:51,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:51,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 4478 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:51,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:51,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:51,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:53,775 INFO L124 PetriNetUnfolderBase]: 7934/13699 cut-off events. [2024-06-28 01:03:53,775 INFO L125 PetriNetUnfolderBase]: For 484132/484188 co-relation queries the response was YES. [2024-06-28 01:03:53,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73633 conditions, 13699 events. 7934/13699 cut-off events. For 484132/484188 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 112812 event pairs, 3700 based on Foata normal form. 27/13255 useless extension candidates. Maximal degree in co-relation 73522. Up to 12084 conditions per place. [2024-06-28 01:03:53,920 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 255 selfloop transitions, 93 changer transitions 0/364 dead transitions. [2024-06-28 01:03:53,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 364 transitions, 5754 flow [2024-06-28 01:03:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:03:53,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-28 01:03:53,921 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 4478 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:03:53,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 364 transitions, 5754 flow [2024-06-28 01:03:55,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 364 transitions, 5610 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:55,150 INFO L231 Difference]: Finished difference. Result has 247 places, 341 transitions, 4628 flow [2024-06-28 01:03:55,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4628, PETRI_PLACES=247, PETRI_TRANSITIONS=341} [2024-06-28 01:03:55,151 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-28 01:03:55,151 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 341 transitions, 4628 flow [2024-06-28 01:03:55,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:55,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:55,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:55,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 01:03:55,151 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:55,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash 104218050, now seen corresponding path program 1 times [2024-06-28 01:03:55,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:55,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605177738] [2024-06-28 01:03:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:55,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:55,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:55,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605177738] [2024-06-28 01:03:55,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605177738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:55,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:55,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:03:55,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570289837] [2024-06-28 01:03:55,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:55,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:03:55,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:03:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:03:55,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:55,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 341 transitions, 4628 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:55,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:55,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:57,027 INFO L124 PetriNetUnfolderBase]: 7940/13706 cut-off events. [2024-06-28 01:03:57,027 INFO L125 PetriNetUnfolderBase]: For 491005/491053 co-relation queries the response was YES. [2024-06-28 01:03:57,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74158 conditions, 13706 events. 7940/13706 cut-off events. For 491005/491053 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 112650 event pairs, 3709 based on Foata normal form. 25/13256 useless extension candidates. Maximal degree in co-relation 74046. Up to 12131 conditions per place. [2024-06-28 01:03:57,170 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 84 changer transitions 0/368 dead transitions. [2024-06-28 01:03:57,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 368 transitions, 5569 flow [2024-06-28 01:03:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:03:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:03:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-28 01:03:57,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-28 01:03:57,171 INFO L175 Difference]: Start difference. First operand has 247 places, 341 transitions, 4628 flow. Second operand 7 states and 210 transitions. [2024-06-28 01:03:57,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 368 transitions, 5569 flow [2024-06-28 01:03:59,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 368 transitions, 5297 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:59,213 INFO L231 Difference]: Finished difference. Result has 249 places, 344 transitions, 4563 flow [2024-06-28 01:03:59,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4563, PETRI_PLACES=249, PETRI_TRANSITIONS=344} [2024-06-28 01:03:59,213 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-28 01:03:59,213 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 344 transitions, 4563 flow [2024-06-28 01:03:59,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:59,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:59,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:59,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 01:03:59,214 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:59,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash -398375302, now seen corresponding path program 2 times [2024-06-28 01:03:59,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:59,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883682938] [2024-06-28 01:03:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:59,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:59,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:59,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883682938] [2024-06-28 01:03:59,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883682938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:59,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:59,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:03:59,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413112961] [2024-06-28 01:03:59,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:59,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:03:59,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:03:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:03:59,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:03:59,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 344 transitions, 4563 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:59,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:59,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:03:59,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:00,990 INFO L124 PetriNetUnfolderBase]: 7955/13724 cut-off events. [2024-06-28 01:04:00,990 INFO L125 PetriNetUnfolderBase]: For 497599/497651 co-relation queries the response was YES. [2024-06-28 01:04:01,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73795 conditions, 13724 events. 7955/13724 cut-off events. For 497599/497651 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112888 event pairs, 3702 based on Foata normal form. 28/13276 useless extension candidates. Maximal degree in co-relation 73682. Up to 12143 conditions per place. [2024-06-28 01:04:01,139 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 260 selfloop transitions, 92 changer transitions 0/368 dead transitions. [2024-06-28 01:04:01,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 368 transitions, 5681 flow [2024-06-28 01:04:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:04:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:04:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 01:04:01,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-28 01:04:01,140 INFO L175 Difference]: Start difference. First operand has 249 places, 344 transitions, 4563 flow. Second operand 6 states and 180 transitions. [2024-06-28 01:04:01,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 368 transitions, 5681 flow [2024-06-28 01:04:02,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 368 transitions, 5501 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:04:02,780 INFO L231 Difference]: Finished difference. Result has 250 places, 350 transitions, 4651 flow [2024-06-28 01:04:02,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4651, PETRI_PLACES=250, PETRI_TRANSITIONS=350} [2024-06-28 01:04:02,780 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-28 01:04:02,781 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 350 transitions, 4651 flow [2024-06-28 01:04:02,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:02,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:02,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 01:04:02,781 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:02,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2087348332, now seen corresponding path program 3 times [2024-06-28 01:04:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874708618] [2024-06-28 01:04:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:02,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874708618] [2024-06-28 01:04:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874708618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:02,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:02,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:02,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989276191] [2024-06-28 01:04:02,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:02,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:02,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 350 transitions, 4651 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:02,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:02,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:02,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:04,716 INFO L124 PetriNetUnfolderBase]: 7952/13717 cut-off events. [2024-06-28 01:04:04,716 INFO L125 PetriNetUnfolderBase]: For 505945/505970 co-relation queries the response was YES. [2024-06-28 01:04:04,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73836 conditions, 13717 events. 7952/13717 cut-off events. For 505945/505970 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112808 event pairs, 3684 based on Foata normal form. 16/13251 useless extension candidates. Maximal degree in co-relation 73722. Up to 12138 conditions per place. [2024-06-28 01:04:04,840 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 271 selfloop transitions, 85 changer transitions 0/372 dead transitions. [2024-06-28 01:04:04,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 372 transitions, 5713 flow [2024-06-28 01:04:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:04:04,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-28 01:04:04,841 INFO L175 Difference]: Start difference. First operand has 250 places, 350 transitions, 4651 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:04:04,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 372 transitions, 5713 flow [2024-06-28 01:04:06,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 372 transitions, 5597 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 01:04:06,366 INFO L231 Difference]: Finished difference. Result has 255 places, 350 transitions, 4711 flow [2024-06-28 01:04:06,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4711, PETRI_PLACES=255, PETRI_TRANSITIONS=350} [2024-06-28 01:04:06,366 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-28 01:04:06,366 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 350 transitions, 4711 flow [2024-06-28 01:04:06,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:06,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:06,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:06,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 01:04:06,367 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:06,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1324187902, now seen corresponding path program 4 times [2024-06-28 01:04:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:06,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870774254] [2024-06-28 01:04:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:06,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870774254] [2024-06-28 01:04:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870774254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:06,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:06,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:06,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76220441] [2024-06-28 01:04:06,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:06,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:06,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:06,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:06,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:06,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 350 transitions, 4711 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:06,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:06,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:06,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:08,325 INFO L124 PetriNetUnfolderBase]: 7946/13704 cut-off events. [2024-06-28 01:04:08,325 INFO L125 PetriNetUnfolderBase]: For 516550/516631 co-relation queries the response was YES. [2024-06-28 01:04:08,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73818 conditions, 13704 events. 7946/13704 cut-off events. For 516550/516631 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 112871 event pairs, 3723 based on Foata normal form. 60/13290 useless extension candidates. Maximal degree in co-relation 73703. Up to 12133 conditions per place. [2024-06-28 01:04:08,503 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 263 selfloop transitions, 84 changer transitions 0/363 dead transitions. [2024-06-28 01:04:08,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 363 transitions, 5735 flow [2024-06-28 01:04:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 01:04:08,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60790273556231 [2024-06-28 01:04:08,504 INFO L175 Difference]: Start difference. First operand has 255 places, 350 transitions, 4711 flow. Second operand 7 states and 200 transitions. [2024-06-28 01:04:08,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 363 transitions, 5735 flow [2024-06-28 01:04:10,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 363 transitions, 5495 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 01:04:10,474 INFO L231 Difference]: Finished difference. Result has 255 places, 350 transitions, 4646 flow [2024-06-28 01:04:10,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4646, PETRI_PLACES=255, PETRI_TRANSITIONS=350} [2024-06-28 01:04:10,474 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 204 predicate places. [2024-06-28 01:04:10,475 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 350 transitions, 4646 flow [2024-06-28 01:04:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:10,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:10,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:10,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 01:04:10,475 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:10,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:10,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1885225214, now seen corresponding path program 4 times [2024-06-28 01:04:10,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:10,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531429661] [2024-06-28 01:04:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531429661] [2024-06-28 01:04:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531429661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:10,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:10,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893440762] [2024-06-28 01:04:10,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:10,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:10,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:10,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:10,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 350 transitions, 4646 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:10,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:10,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:10,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:12,673 INFO L124 PetriNetUnfolderBase]: 8110/13983 cut-off events. [2024-06-28 01:04:12,674 INFO L125 PetriNetUnfolderBase]: For 582599/582674 co-relation queries the response was YES. [2024-06-28 01:04:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75684 conditions, 13983 events. 8110/13983 cut-off events. For 582599/582674 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115541 event pairs, 3770 based on Foata normal form. 75/13577 useless extension candidates. Maximal degree in co-relation 75568. Up to 12197 conditions per place. [2024-06-28 01:04:12,809 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 270 selfloop transitions, 86 changer transitions 0/372 dead transitions. [2024-06-28 01:04:12,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 372 transitions, 5826 flow [2024-06-28 01:04:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:04:12,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-28 01:04:12,811 INFO L175 Difference]: Start difference. First operand has 255 places, 350 transitions, 4646 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:04:12,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 372 transitions, 5826 flow [2024-06-28 01:04:14,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 372 transitions, 5630 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:14,646 INFO L231 Difference]: Finished difference. Result has 256 places, 353 transitions, 4737 flow [2024-06-28 01:04:14,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4737, PETRI_PLACES=256, PETRI_TRANSITIONS=353} [2024-06-28 01:04:14,647 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 205 predicate places. [2024-06-28 01:04:14,647 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 353 transitions, 4737 flow [2024-06-28 01:04:14,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:14,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:14,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:14,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 01:04:14,647 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:14,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:14,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1250739996, now seen corresponding path program 3 times [2024-06-28 01:04:14,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:14,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247103178] [2024-06-28 01:04:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:14,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247103178] [2024-06-28 01:04:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247103178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:14,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:14,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853921224] [2024-06-28 01:04:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:14,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 353 transitions, 4737 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:16,894 INFO L124 PetriNetUnfolderBase]: 8116/13999 cut-off events. [2024-06-28 01:04:16,894 INFO L125 PetriNetUnfolderBase]: For 540938/540946 co-relation queries the response was YES. [2024-06-28 01:04:16,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76273 conditions, 13999 events. 8116/13999 cut-off events. For 540938/540946 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115564 event pairs, 3746 based on Foata normal form. 1/13504 useless extension candidates. Maximal degree in co-relation 76155. Up to 12388 conditions per place. [2024-06-28 01:04:17,039 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 277 selfloop transitions, 84 changer transitions 0/377 dead transitions. [2024-06-28 01:04:17,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 377 transitions, 5701 flow [2024-06-28 01:04:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:04:17,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6322188449848024 [2024-06-28 01:04:17,040 INFO L175 Difference]: Start difference. First operand has 256 places, 353 transitions, 4737 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:04:17,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 377 transitions, 5701 flow [2024-06-28 01:04:18,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 5454 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-28 01:04:18,677 INFO L231 Difference]: Finished difference. Result has 258 places, 356 transitions, 4702 flow [2024-06-28 01:04:18,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4702, PETRI_PLACES=258, PETRI_TRANSITIONS=356} [2024-06-28 01:04:18,678 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 207 predicate places. [2024-06-28 01:04:18,678 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 356 transitions, 4702 flow [2024-06-28 01:04:18,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:18,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:18,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 01:04:18,678 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:18,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1359582980, now seen corresponding path program 4 times [2024-06-28 01:04:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807935154] [2024-06-28 01:04:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:18,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807935154] [2024-06-28 01:04:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807935154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:18,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:18,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398383683] [2024-06-28 01:04:18,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:18,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:18,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:18,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:18,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:18,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 356 transitions, 4702 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:18,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:18,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:18,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:21,210 INFO L124 PetriNetUnfolderBase]: 8113/13989 cut-off events. [2024-06-28 01:04:21,210 INFO L125 PetriNetUnfolderBase]: For 535897/535897 co-relation queries the response was YES. [2024-06-28 01:04:21,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74880 conditions, 13989 events. 8113/13989 cut-off events. For 535897/535897 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115306 event pairs, 3739 based on Foata normal form. 1/13488 useless extension candidates. Maximal degree in co-relation 74761. Up to 12386 conditions per place. [2024-06-28 01:04:21,342 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 278 selfloop transitions, 86 changer transitions 0/380 dead transitions. [2024-06-28 01:04:21,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 5800 flow [2024-06-28 01:04:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:04:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:04:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-28 01:04:21,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607565011820331 [2024-06-28 01:04:21,343 INFO L175 Difference]: Start difference. First operand has 258 places, 356 transitions, 4702 flow. Second operand 9 states and 257 transitions. [2024-06-28 01:04:21,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 5800 flow [2024-06-28 01:04:23,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 380 transitions, 5679 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:04:23,142 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 4759 flow [2024-06-28 01:04:23,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4759, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-28 01:04:23,142 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 212 predicate places. [2024-06-28 01:04:23,142 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 4759 flow [2024-06-28 01:04:23,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:23,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:23,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:23,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 01:04:23,143 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:23,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:23,143 INFO L85 PathProgramCache]: Analyzing trace with hash 99031046, now seen corresponding path program 5 times [2024-06-28 01:04:23,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:23,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787756718] [2024-06-28 01:04:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:23,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:23,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787756718] [2024-06-28 01:04:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787756718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:23,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:23,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340274728] [2024-06-28 01:04:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:23,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:23,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 4759 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:23,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:23,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:23,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:25,655 INFO L124 PetriNetUnfolderBase]: 8105/13976 cut-off events. [2024-06-28 01:04:25,655 INFO L125 PetriNetUnfolderBase]: For 545044/545044 co-relation queries the response was YES. [2024-06-28 01:04:25,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74822 conditions, 13976 events. 8105/13976 cut-off events. For 545044/545044 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115323 event pairs, 3739 based on Foata normal form. 2/13476 useless extension candidates. Maximal degree in co-relation 74701. Up to 12378 conditions per place. [2024-06-28 01:04:25,789 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 278 selfloop transitions, 80 changer transitions 0/374 dead transitions. [2024-06-28 01:04:25,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 5677 flow [2024-06-28 01:04:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:04:25,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231003039513677 [2024-06-28 01:04:25,790 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 4759 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:04:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 5677 flow [2024-06-28 01:04:27,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 374 transitions, 5431 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-28 01:04:27,398 INFO L231 Difference]: Finished difference. Result has 261 places, 356 transitions, 4681 flow [2024-06-28 01:04:27,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4681, PETRI_PLACES=261, PETRI_TRANSITIONS=356} [2024-06-28 01:04:27,398 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-28 01:04:27,398 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 356 transitions, 4681 flow [2024-06-28 01:04:27,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:27,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:27,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:27,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 01:04:27,399 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:27,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2131260096, now seen corresponding path program 6 times [2024-06-28 01:04:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:27,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223070504] [2024-06-28 01:04:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:27,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223070504] [2024-06-28 01:04:27,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223070504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:27,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:04:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394884837] [2024-06-28 01:04:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:04:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:04:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:04:27,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:27,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 356 transitions, 4681 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:27,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:27,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:27,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:29,805 INFO L124 PetriNetUnfolderBase]: 8118/13997 cut-off events. [2024-06-28 01:04:29,805 INFO L125 PetriNetUnfolderBase]: For 557027/557075 co-relation queries the response was YES. [2024-06-28 01:04:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75079 conditions, 13997 events. 8118/13997 cut-off events. For 557027/557075 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115663 event pairs, 3769 based on Foata normal form. 34/13537 useless extension candidates. Maximal degree in co-relation 74958. Up to 12391 conditions per place. [2024-06-28 01:04:29,932 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 268 selfloop transitions, 87 changer transitions 0/371 dead transitions. [2024-06-28 01:04:29,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 371 transitions, 5636 flow [2024-06-28 01:04:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:04:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:04:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 01:04:29,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205673758865248 [2024-06-28 01:04:29,933 INFO L175 Difference]: Start difference. First operand has 261 places, 356 transitions, 4681 flow. Second operand 6 states and 175 transitions. [2024-06-28 01:04:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 371 transitions, 5636 flow [2024-06-28 01:04:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 5470 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:31,431 INFO L231 Difference]: Finished difference. Result has 261 places, 360 transitions, 4755 flow [2024-06-28 01:04:31,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4755, PETRI_PLACES=261, PETRI_TRANSITIONS=360} [2024-06-28 01:04:31,432 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-28 01:04:31,432 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 360 transitions, 4755 flow [2024-06-28 01:04:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:31,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:31,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:31,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 01:04:31,432 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:31,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2034965388, now seen corresponding path program 7 times [2024-06-28 01:04:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106700214] [2024-06-28 01:04:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:31,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:31,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106700214] [2024-06-28 01:04:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106700214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:31,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:04:31,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315137944] [2024-06-28 01:04:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:31,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:04:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:04:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:04:31,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:31,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 360 transitions, 4755 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:31,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:31,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:31,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:34,036 INFO L124 PetriNetUnfolderBase]: 8110/13985 cut-off events. [2024-06-28 01:04:34,036 INFO L125 PetriNetUnfolderBase]: For 561749/561795 co-relation queries the response was YES. [2024-06-28 01:04:34,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74979 conditions, 13985 events. 8110/13985 cut-off events. For 561749/561795 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 115419 event pairs, 3769 based on Foata normal form. 34/13524 useless extension candidates. Maximal degree in co-relation 74857. Up to 12383 conditions per place. [2024-06-28 01:04:34,170 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 271 selfloop transitions, 83 changer transitions 0/370 dead transitions. [2024-06-28 01:04:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 370 transitions, 5487 flow [2024-06-28 01:04:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:04:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:04:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 01:04:34,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2024-06-28 01:04:34,177 INFO L175 Difference]: Start difference. First operand has 261 places, 360 transitions, 4755 flow. Second operand 6 states and 173 transitions. [2024-06-28 01:04:34,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 370 transitions, 5487 flow [2024-06-28 01:04:35,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 370 transitions, 5175 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:35,717 INFO L231 Difference]: Finished difference. Result has 261 places, 360 transitions, 4618 flow [2024-06-28 01:04:35,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4618, PETRI_PLACES=261, PETRI_TRANSITIONS=360} [2024-06-28 01:04:35,718 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-28 01:04:35,718 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 360 transitions, 4618 flow [2024-06-28 01:04:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:35,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:35,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 01:04:35,719 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:35,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1190304704, now seen corresponding path program 1 times [2024-06-28 01:04:35,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:35,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975261768] [2024-06-28 01:04:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:35,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:35,789 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 01:04:35,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:35,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975261768] [2024-06-28 01:04:35,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975261768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:35,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:35,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234515379] [2024-06-28 01:04:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:35,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:35,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:35,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 360 transitions, 4618 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:35,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:35,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:35,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:38,372 INFO L124 PetriNetUnfolderBase]: 8157/14151 cut-off events. [2024-06-28 01:04:38,372 INFO L125 PetriNetUnfolderBase]: For 585495/585495 co-relation queries the response was YES. [2024-06-28 01:04:38,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76201 conditions, 14151 events. 8157/14151 cut-off events. For 585495/585495 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 117398 event pairs, 3533 based on Foata normal form. 2/13648 useless extension candidates. Maximal degree in co-relation 76078. Up to 12604 conditions per place. [2024-06-28 01:04:38,516 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 349 selfloop transitions, 27 changer transitions 0/392 dead transitions. [2024-06-28 01:04:38,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 392 transitions, 5760 flow [2024-06-28 01:04:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:04:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:04:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:04:38,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037234042553191 [2024-06-28 01:04:38,517 INFO L175 Difference]: Start difference. First operand has 261 places, 360 transitions, 4618 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:04:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 392 transitions, 5760 flow [2024-06-28 01:04:40,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 392 transitions, 5560 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:40,181 INFO L231 Difference]: Finished difference. Result has 263 places, 364 transitions, 4633 flow [2024-06-28 01:04:40,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4633, PETRI_PLACES=263, PETRI_TRANSITIONS=364} [2024-06-28 01:04:40,182 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 212 predicate places. [2024-06-28 01:04:40,182 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 364 transitions, 4633 flow [2024-06-28 01:04:40,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:40,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:40,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 01:04:40,182 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:40,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash -268880926, now seen corresponding path program 2 times [2024-06-28 01:04:40,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:40,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414031781] [2024-06-28 01:04:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:40,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414031781] [2024-06-28 01:04:40,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414031781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:40,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:40,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:04:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570800670] [2024-06-28 01:04:40,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:40,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:04:40,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:40,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:04:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:04:40,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:40,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 364 transitions, 4633 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:40,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:40,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:40,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:42,746 INFO L124 PetriNetUnfolderBase]: 8152/14030 cut-off events. [2024-06-28 01:04:42,746 INFO L125 PetriNetUnfolderBase]: For 591581/591581 co-relation queries the response was YES. [2024-06-28 01:04:42,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75917 conditions, 14030 events. 8152/14030 cut-off events. For 591581/591581 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 115495 event pairs, 3717 based on Foata normal form. 2/13525 useless extension candidates. Maximal degree in co-relation 75793. Up to 12661 conditions per place. [2024-06-28 01:04:42,909 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 346 selfloop transitions, 22 changer transitions 0/384 dead transitions. [2024-06-28 01:04:42,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 384 transitions, 5421 flow [2024-06-28 01:04:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:04:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:04:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-28 01:04:42,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987841945288754 [2024-06-28 01:04:42,910 INFO L175 Difference]: Start difference. First operand has 263 places, 364 transitions, 4633 flow. Second operand 7 states and 197 transitions. [2024-06-28 01:04:42,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 384 transitions, 5421 flow [2024-06-28 01:04:44,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 384 transitions, 5258 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-28 01:04:44,965 INFO L231 Difference]: Finished difference. Result has 266 places, 364 transitions, 4519 flow [2024-06-28 01:04:44,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4519, PETRI_PLACES=266, PETRI_TRANSITIONS=364} [2024-06-28 01:04:44,966 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-28 01:04:44,966 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 364 transitions, 4519 flow [2024-06-28 01:04:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:44,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:44,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 01:04:44,966 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:44,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1632653922, now seen corresponding path program 3 times [2024-06-28 01:04:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:44,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115516273] [2024-06-28 01:04:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:45,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:45,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115516273] [2024-06-28 01:04:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115516273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:45,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:45,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:04:45,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108182402] [2024-06-28 01:04:45,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:45,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:04:45,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:45,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:04:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:04:45,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:45,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 364 transitions, 4519 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:45,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:45,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:45,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:47,311 INFO L124 PetriNetUnfolderBase]: 8147/14020 cut-off events. [2024-06-28 01:04:47,311 INFO L125 PetriNetUnfolderBase]: For 591907/591919 co-relation queries the response was YES. [2024-06-28 01:04:47,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75209 conditions, 14020 events. 8147/14020 cut-off events. For 591907/591919 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 115516 event pairs, 3723 based on Foata normal form. 11/13525 useless extension candidates. Maximal degree in co-relation 75083. Up to 12654 conditions per place. [2024-06-28 01:04:47,468 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 341 selfloop transitions, 22 changer transitions 0/379 dead transitions. [2024-06-28 01:04:47,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 379 transitions, 5359 flow [2024-06-28 01:04:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:04:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:04:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 01:04:47,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-06-28 01:04:47,686 INFO L175 Difference]: Start difference. First operand has 266 places, 364 transitions, 4519 flow. Second operand 6 states and 168 transitions. [2024-06-28 01:04:47,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 379 transitions, 5359 flow [2024-06-28 01:04:49,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 379 transitions, 5305 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:49,367 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4598 flow [2024-06-28 01:04:49,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4598, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-28 01:04:49,368 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-28 01:04:49,368 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4598 flow [2024-06-28 01:04:49,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:49,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:49,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:49,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 01:04:49,368 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:49,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash -77145410, now seen corresponding path program 1 times [2024-06-28 01:04:49,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:49,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268659410] [2024-06-28 01:04:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:49,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:49,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:49,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268659410] [2024-06-28 01:04:49,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268659410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:49,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:49,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:04:49,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110470923] [2024-06-28 01:04:49,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:49,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:04:49,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:49,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:04:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:04:49,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:49,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4598 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:49,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:49,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:49,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:51,812 INFO L124 PetriNetUnfolderBase]: 8154/14051 cut-off events. [2024-06-28 01:04:51,812 INFO L125 PetriNetUnfolderBase]: For 601689/601695 co-relation queries the response was YES. [2024-06-28 01:04:51,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75550 conditions, 14051 events. 8154/14051 cut-off events. For 601689/601695 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 115807 event pairs, 3727 based on Foata normal form. 4/13545 useless extension candidates. Maximal degree in co-relation 75423. Up to 12550 conditions per place. [2024-06-28 01:04:51,955 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 311 selfloop transitions, 56 changer transitions 0/383 dead transitions. [2024-06-28 01:04:51,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 383 transitions, 5591 flow [2024-06-28 01:04:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:04:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:04:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-28 01:04:51,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2024-06-28 01:04:51,956 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4598 flow. Second operand 6 states and 177 transitions. [2024-06-28 01:04:51,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 383 transitions, 5591 flow [2024-06-28 01:04:54,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 383 transitions, 5474 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 01:04:54,058 INFO L231 Difference]: Finished difference. Result has 268 places, 369 transitions, 4659 flow [2024-06-28 01:04:54,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4659, PETRI_PLACES=268, PETRI_TRANSITIONS=369} [2024-06-28 01:04:54,058 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 217 predicate places. [2024-06-28 01:04:54,059 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 369 transitions, 4659 flow [2024-06-28 01:04:54,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:54,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:54,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:54,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 01:04:54,059 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:54,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash -620399642, now seen corresponding path program 2 times [2024-06-28 01:04:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73928900] [2024-06-28 01:04:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:54,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:54,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73928900] [2024-06-28 01:04:54,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73928900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:54,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:54,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:04:54,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762222798] [2024-06-28 01:04:54,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:54,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:04:54,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:04:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:04:54,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-06-28 01:04:54,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 369 transitions, 4659 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:54,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:54,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-06-28 01:04:54,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand