./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:19:08,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:19:08,864 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:19:08,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:19:08,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:19:08,899 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:19:08,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:19:08,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:19:08,901 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:19:08,905 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:19:08,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:19:08,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:19:08,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:19:08,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:19:08,908 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:19:08,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:19:08,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:19:08,909 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:19:08,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:19:08,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:19:08,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:19:08,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:19:08,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:19:08,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:19:08,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:19:08,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:19:08,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:19:08,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:19:08,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:19:08,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:19:08,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:19:08,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:19:08,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:19:08,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:19:08,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:19:08,915 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:19:08,915 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:19:08,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:19:08,915 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:19:08,916 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:19:08,916 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:19:08,916 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:19:08,916 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:19:08,917 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:19:09,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:19:09,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:19:09,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:19:09,189 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:19:09,190 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:19:09,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:19:10,348 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:19:10,566 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:19:10,566 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:19:10,587 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a84d8a9/ecc6e52395f04bc6b72f0f9c4157cda8/FLAG9c98d4448 [2024-06-04 14:19:10,597 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68a84d8a9/ecc6e52395f04bc6b72f0f9c4157cda8 [2024-06-04 14:19:10,599 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:19:10,600 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:19:10,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 14:19:10,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:19:10,743 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:19:10,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:19:10,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:19:10,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:19:10,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:19:10" (1/2) ... [2024-06-04 14:19:10,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75621e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:19:10, skipping insertion in model container [2024-06-04 14:19:10,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:19:10" (1/2) ... [2024-06-04 14:19:10,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7802dbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:19:10, skipping insertion in model container [2024-06-04 14:19:10,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:19:10" (2/2) ... [2024-06-04 14:19:10,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75621e9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:10, skipping insertion in model container [2024-06-04 14:19:10,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:19:10" (2/2) ... [2024-06-04 14:19:10,754 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:19:10,813 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:19:10,815 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 14:19:10,815 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 14:19:10,815 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 14:19:10,815 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 14:19:10,815 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:19:10,816 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-04 14:19:10,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:19:11,252 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:19:11,261 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:19:11,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:19:11,379 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:19:11,380 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11 WrapperNode [2024-06-04 14:19:11,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:19:11,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:19:11,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:19:11,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:19:11,388 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 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,417 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 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,455 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-04 14:19:11,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:19:11,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:19:11,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:19:11,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:19:11,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,478 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,504 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]. [2024-06-04 14:19:11,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,529 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:19:11,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:19:11,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:19:11,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:19:11,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (1/1) ... [2024-06-04 14:19:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:19:11,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:19:11,566 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) [2024-06-04 14:19:11,588 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 [2024-06-04 14:19:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:19:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:19:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:19:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:19:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:19:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:19:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:19:11,607 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:19:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:19:11,607 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:19:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:19:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:19:11,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:19:11,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:19:11,610 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:19:11,768 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:19:11,770 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:19:12,062 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:19:12,063 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:19:12,160 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:19:12,161 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:19:12,161 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:19:12 BoogieIcfgContainer [2024-06-04 14:19:12,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:19:12,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:19:12,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:19:12,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:19:12,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:19:10" (1/4) ... [2024-06-04 14:19:12,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e663798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:19:12, skipping insertion in model container [2024-06-04 14:19:12,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:19:10" (2/4) ... [2024-06-04 14:19:12,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e663798 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:19:12, skipping insertion in model container [2024-06-04 14:19:12,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:19:11" (3/4) ... [2024-06-04 14:19:12,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e663798 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:19:12, skipping insertion in model container [2024-06-04 14:19:12,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:19:12" (4/4) ... [2024-06-04 14:19:12,170 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:19:12,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:19:12,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:19:12,186 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:19:12,231 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:19:12,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-04 14:19:12,287 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-04 14:19:12,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:19:12,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 0/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:19:12,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-04 14:19:12,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-04 14:19:12,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:19:12,307 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;@7a6a8b59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:19:12,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:19:12,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:19:12,315 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:19:12,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:19:12,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:12,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:19:12,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:12,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1398728841, now seen corresponding path program 1 times [2024-06-04 14:19:12,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:12,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205591314] [2024-06-04 14:19:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:12,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:12,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:12,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205591314] [2024-06-04 14:19:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205591314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:19:12,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962967577] [2024-06-04 14:19:12,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:19:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:12,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:19:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:19:13,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-06-04 14:19:13,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:13,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:13,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-06-04 14:19:13,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:13,437 INFO L124 PetriNetUnfolderBase]: 1447/2146 cut-off events. [2024-06-04 14:19:13,438 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-04 14:19:13,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2146 events. 1447/2146 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11653 event pairs, 968 based on Foata normal form. 1/2065 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-04 14:19:13,462 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 37 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-04 14:19:13,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 213 flow [2024-06-04 14:19:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:19:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:19:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-04 14:19:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-04 14:19:13,475 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 106 transitions. [2024-06-04 14:19:13,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 213 flow [2024-06-04 14:19:13,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:13,479 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-04 14:19:13,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-04 14:19:13,486 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-04 14:19:13,486 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-04 14:19:13,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:13,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:13,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:19:13,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:13,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:13,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1098718867, now seen corresponding path program 1 times [2024-06-04 14:19:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:13,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715862935] [2024-06-04 14:19:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:13,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:13,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715862935] [2024-06-04 14:19:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715862935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:13,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:13,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:19:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595595908] [2024-06-04 14:19:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:19:13,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:19:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:19:13,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:13,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:13,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:13,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:13,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:14,258 INFO L124 PetriNetUnfolderBase]: 2467/3606 cut-off events. [2024-06-04 14:19:14,258 INFO L125 PetriNetUnfolderBase]: For 758/950 co-relation queries the response was YES. [2024-06-04 14:19:14,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 3606 events. 2467/3606 cut-off events. For 758/950 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19391 event pairs, 1331 based on Foata normal form. 35/3610 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-04 14:19:14,290 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-06-04 14:19:14,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 315 flow [2024-06-04 14:19:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:19:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:19:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-04 14:19:14,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-04 14:19:14,296 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 136 transitions. [2024-06-04 14:19:14,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 315 flow [2024-06-04 14:19:14,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:19:14,303 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 154 flow [2024-06-04 14:19:14,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-06-04 14:19:14,304 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-04 14:19:14,305 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 154 flow [2024-06-04 14:19:14,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:14,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:14,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:14,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:19:14,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:14,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 721389010, now seen corresponding path program 1 times [2024-06-04 14:19:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432386208] [2024-06-04 14:19:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:14,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432386208] [2024-06-04 14:19:14,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432386208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:14,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:14,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:19:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246985840] [2024-06-04 14:19:14,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:14,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:19:14,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:19:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:19:14,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:14,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:14,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:14,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:14,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:14,988 INFO L124 PetriNetUnfolderBase]: 2618/4065 cut-off events. [2024-06-04 14:19:14,989 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-04 14:19:14,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 4065 events. 2618/4065 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23317 event pairs, 1356 based on Foata normal form. 3/4041 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-04 14:19:15,017 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-04 14:19:15,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 346 flow [2024-06-04 14:19:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:19:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:19:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-04 14:19:15,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-04 14:19:15,022 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 154 flow. Second operand 4 states and 129 transitions. [2024-06-04 14:19:15,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 346 flow [2024-06-04 14:19:15,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:15,027 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 214 flow [2024-06-04 14:19:15,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-04 14:19:15,028 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-04 14:19:15,028 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 214 flow [2024-06-04 14:19:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:19:15,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1765159729, now seen corresponding path program 1 times [2024-06-04 14:19:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:15,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124674011] [2024-06-04 14:19:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:15,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:15,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124674011] [2024-06-04 14:19:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124674011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:15,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:15,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663639277] [2024-06-04 14:19:15,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:15,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:15,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:15,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:15,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:15,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:15,720 INFO L124 PetriNetUnfolderBase]: 2603/4010 cut-off events. [2024-06-04 14:19:15,720 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-04 14:19:15,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11039 conditions, 4010 events. 2603/4010 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22824 event pairs, 1272 based on Foata normal form. 6/3972 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-04 14:19:15,755 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 59 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-04 14:19:15,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 436 flow [2024-06-04 14:19:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-04 14:19:15,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-04 14:19:15,757 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 214 flow. Second operand 5 states and 158 transitions. [2024-06-04 14:19:15,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 436 flow [2024-06-04 14:19:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:15,764 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 266 flow [2024-06-04 14:19:15,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-04 14:19:15,766 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-04 14:19:15,766 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 266 flow [2024-06-04 14:19:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:15,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:15,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:15,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:19:15,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:15,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -187121951, now seen corresponding path program 1 times [2024-06-04 14:19:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:15,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736418766] [2024-06-04 14:19:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:16,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:16,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736418766] [2024-06-04 14:19:16,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736418766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:16,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:16,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:19:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889723623] [2024-06-04 14:19:16,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:19:16,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:19:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:19:16,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:16,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:16,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:16,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:16,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:16,548 INFO L124 PetriNetUnfolderBase]: 3372/5077 cut-off events. [2024-06-04 14:19:16,548 INFO L125 PetriNetUnfolderBase]: For 6315/6366 co-relation queries the response was YES. [2024-06-04 14:19:16,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15120 conditions, 5077 events. 3372/5077 cut-off events. For 6315/6366 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28307 event pairs, 1298 based on Foata normal form. 16/5064 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-04 14:19:16,589 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 57 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-04 14:19:16,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 508 flow [2024-06-04 14:19:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:19:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:19:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-04 14:19:16,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-04 14:19:16,595 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 266 flow. Second operand 4 states and 132 transitions. [2024-06-04 14:19:16,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 508 flow [2024-06-04 14:19:16,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 478 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:16,605 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 334 flow [2024-06-04 14:19:16,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-04 14:19:16,608 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-04 14:19:16,608 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 334 flow [2024-06-04 14:19:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:16,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:16,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:19:16,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:16,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash -167339921, now seen corresponding path program 2 times [2024-06-04 14:19:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228670358] [2024-06-04 14:19:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:16,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:16,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228670358] [2024-06-04 14:19:16,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228670358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:16,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:19:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546078044] [2024-06-04 14:19:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:16,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:19:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:19:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:19:16,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:16,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:16,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:16,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:17,357 INFO L124 PetriNetUnfolderBase]: 3363/5187 cut-off events. [2024-06-04 14:19:17,357 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-04 14:19:17,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 5187 events. 3363/5187 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29767 event pairs, 1431 based on Foata normal form. 18/5171 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-04 14:19:17,392 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-04 14:19:17,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 672 flow [2024-06-04 14:19:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-04 14:19:17,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-04 14:19:17,394 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 334 flow. Second operand 5 states and 158 transitions. [2024-06-04 14:19:17,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 672 flow [2024-06-04 14:19:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 606 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:17,411 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 449 flow [2024-06-04 14:19:17,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-04 14:19:17,412 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-04 14:19:17,412 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 449 flow [2024-06-04 14:19:17,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:17,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:17,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:17,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:19:17,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:17,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1155763418, now seen corresponding path program 1 times [2024-06-04 14:19:17,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:17,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155539702] [2024-06-04 14:19:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:17,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:17,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:17,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155539702] [2024-06-04 14:19:17,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155539702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:17,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:17,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745982630] [2024-06-04 14:19:17,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:17,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:17,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:17,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:17,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:17,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:17,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:17,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:18,562 INFO L124 PetriNetUnfolderBase]: 4824/7274 cut-off events. [2024-06-04 14:19:18,563 INFO L125 PetriNetUnfolderBase]: For 18241/18455 co-relation queries the response was YES. [2024-06-04 14:19:18,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 7274 events. 4824/7274 cut-off events. For 18241/18455 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43869 event pairs, 1097 based on Foata normal form. 104/7312 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-04 14:19:18,616 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-04 14:19:18,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 132 transitions, 951 flow [2024-06-04 14:19:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-04 14:19:18,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-04 14:19:18,618 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 449 flow. Second operand 6 states and 204 transitions. [2024-06-04 14:19:18,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 132 transitions, 951 flow [2024-06-04 14:19:18,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 919 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:18,635 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 596 flow [2024-06-04 14:19:18,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-04 14:19:18,636 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-06-04 14:19:18,636 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 596 flow [2024-06-04 14:19:18,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:18,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:18,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:18,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:19:18,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:18,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -546121448, now seen corresponding path program 2 times [2024-06-04 14:19:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:18,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42847662] [2024-06-04 14:19:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:18,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:18,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42847662] [2024-06-04 14:19:18,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42847662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:18,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:18,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200343248] [2024-06-04 14:19:18,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:18,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:18,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:18,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:18,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:18,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:18,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:19,679 INFO L124 PetriNetUnfolderBase]: 4554/6934 cut-off events. [2024-06-04 14:19:19,680 INFO L125 PetriNetUnfolderBase]: For 24495/24729 co-relation queries the response was YES. [2024-06-04 14:19:19,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 6934 events. 4554/6934 cut-off events. For 24495/24729 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41837 event pairs, 1415 based on Foata normal form. 122/6984 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-04 14:19:19,735 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 79 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-04 14:19:19,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 942 flow [2024-06-04 14:19:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-04 14:19:19,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664 [2024-06-04 14:19:19,737 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 596 flow. Second operand 5 states and 166 transitions. [2024-06-04 14:19:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 942 flow [2024-06-04 14:19:19,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 890 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:19,770 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 648 flow [2024-06-04 14:19:19,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=648, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-04 14:19:19,772 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-06-04 14:19:19,772 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 648 flow [2024-06-04 14:19:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:19,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:19:19,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:19,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 679773506, now seen corresponding path program 3 times [2024-06-04 14:19:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:19,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290743642] [2024-06-04 14:19:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:20,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:20,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290743642] [2024-06-04 14:19:20,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290743642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:20,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648697162] [2024-06-04 14:19:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:20,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:20,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:20,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 648 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:20,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:20,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:20,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:20,972 INFO L124 PetriNetUnfolderBase]: 4631/7074 cut-off events. [2024-06-04 14:19:20,972 INFO L125 PetriNetUnfolderBase]: For 25173/25461 co-relation queries the response was YES. [2024-06-04 14:19:20,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27072 conditions, 7074 events. 4631/7074 cut-off events. For 25173/25461 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42819 event pairs, 1615 based on Foata normal form. 34/7042 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-04 14:19:21,022 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-04 14:19:21,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1002 flow [2024-06-04 14:19:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-04 14:19:21,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-04 14:19:21,028 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 648 flow. Second operand 6 states and 188 transitions. [2024-06-04 14:19:21,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1002 flow [2024-06-04 14:19:21,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 954 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:21,070 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 684 flow [2024-06-04 14:19:21,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=684, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-04 14:19:21,071 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 28 predicate places. [2024-06-04 14:19:21,072 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 684 flow [2024-06-04 14:19:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:21,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:21,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:19:21,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:21,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 679957956, now seen corresponding path program 1 times [2024-06-04 14:19:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:21,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682253851] [2024-06-04 14:19:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:21,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:21,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:21,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682253851] [2024-06-04 14:19:21,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682253851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:21,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:21,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:21,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450568423] [2024-06-04 14:19:21,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:21,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:21,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:21,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 684 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:21,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:21,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:21,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:22,070 INFO L124 PetriNetUnfolderBase]: 4592/7017 cut-off events. [2024-06-04 14:19:22,070 INFO L125 PetriNetUnfolderBase]: For 27468/27756 co-relation queries the response was YES. [2024-06-04 14:19:22,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27212 conditions, 7017 events. 4592/7017 cut-off events. For 27468/27756 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42383 event pairs, 1399 based on Foata normal form. 28/6979 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-04 14:19:22,126 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-04 14:19:22,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 1065 flow [2024-06-04 14:19:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-04 14:19:22,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-04 14:19:22,128 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 684 flow. Second operand 6 states and 190 transitions. [2024-06-04 14:19:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 1065 flow [2024-06-04 14:19:22,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 1011 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:22,176 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 738 flow [2024-06-04 14:19:22,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-04 14:19:22,178 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-04 14:19:22,179 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 738 flow [2024-06-04 14:19:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:22,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:22,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:19:22,180 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:22,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1703392822, now seen corresponding path program 1 times [2024-06-04 14:19:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:22,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982486935] [2024-06-04 14:19:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:22,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:22,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982486935] [2024-06-04 14:19:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982486935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:22,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:22,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:22,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525434320] [2024-06-04 14:19:22,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:22,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:22,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:22,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:22,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 738 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) [2024-06-04 14:19:22,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:22,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:22,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:22,930 INFO L124 PetriNetUnfolderBase]: 3701/5679 cut-off events. [2024-06-04 14:19:22,930 INFO L125 PetriNetUnfolderBase]: For 26485/26706 co-relation queries the response was YES. [2024-06-04 14:19:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23361 conditions, 5679 events. 3701/5679 cut-off events. For 26485/26706 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33961 event pairs, 1373 based on Foata normal form. 6/5626 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-04 14:19:22,974 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-04 14:19:22,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1112 flow [2024-06-04 14:19:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-04 14:19:22,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 14:19:22,976 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 738 flow. Second operand 5 states and 155 transitions. [2024-06-04 14:19:22,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1112 flow [2024-06-04 14:19:23,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1053 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:23,019 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 868 flow [2024-06-04 14:19:23,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-04 14:19:23,020 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2024-06-04 14:19:23,020 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 868 flow [2024-06-04 14:19:23,020 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) [2024-06-04 14:19:23,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:23,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:23,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:19:23,021 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:23,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 260177026, now seen corresponding path program 1 times [2024-06-04 14:19:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:23,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498770460] [2024-06-04 14:19:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:23,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498770460] [2024-06-04 14:19:23,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498770460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:23,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:19:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286232578] [2024-06-04 14:19:23,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:23,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:19:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:19:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:19:23,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:23,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 868 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:23,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:23,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:23,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:23,925 INFO L124 PetriNetUnfolderBase]: 5235/7922 cut-off events. [2024-06-04 14:19:23,925 INFO L125 PetriNetUnfolderBase]: For 41689/41796 co-relation queries the response was YES. [2024-06-04 14:19:23,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31932 conditions, 7922 events. 5235/7922 cut-off events. For 41689/41796 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48613 event pairs, 1984 based on Foata normal form. 13/7779 useless extension candidates. Maximal degree in co-relation 31894. Up to 7087 conditions per place. [2024-06-04 14:19:24,009 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 78 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-06-04 14:19:24,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1144 flow [2024-06-04 14:19:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:19:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:19:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-04 14:19:24,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:19:24,011 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 868 flow. Second operand 4 states and 120 transitions. [2024-06-04 14:19:24,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1144 flow [2024-06-04 14:19:24,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1102 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:24,119 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 949 flow [2024-06-04 14:19:24,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-04 14:19:24,121 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-04 14:19:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 949 flow [2024-06-04 14:19:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:24,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:24,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:19:24,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:24,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash -580774871, now seen corresponding path program 1 times [2024-06-04 14:19:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:24,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532968811] [2024-06-04 14:19:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532968811] [2024-06-04 14:19:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532968811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:24,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:24,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:19:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989661852] [2024-06-04 14:19:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:19:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:19:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:19:24,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:24,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 949 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:24,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:25,116 INFO L124 PetriNetUnfolderBase]: 4484/6959 cut-off events. [2024-06-04 14:19:25,116 INFO L125 PetriNetUnfolderBase]: For 42622/42940 co-relation queries the response was YES. [2024-06-04 14:19:25,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30874 conditions, 6959 events. 4484/6959 cut-off events. For 42622/42940 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43192 event pairs, 1425 based on Foata normal form. 52/6941 useless extension candidates. Maximal degree in co-relation 30832. Up to 5675 conditions per place. [2024-06-04 14:19:25,173 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 104 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-04 14:19:25,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1456 flow [2024-06-04 14:19:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:25,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-04 14:19:25,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-04 14:19:25,175 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 949 flow. Second operand 6 states and 190 transitions. [2024-06-04 14:19:25,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1456 flow [2024-06-04 14:19:25,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1452 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:25,263 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1119 flow [2024-06-04 14:19:25,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-06-04 14:19:25,264 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-04 14:19:25,264 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1119 flow [2024-06-04 14:19:25,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:25,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:25,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:25,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:19:25,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:25,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -580714421, now seen corresponding path program 2 times [2024-06-04 14:19:25,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:25,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764639784] [2024-06-04 14:19:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:25,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764639784] [2024-06-04 14:19:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764639784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:25,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:25,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:19:25,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142650342] [2024-06-04 14:19:25,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:25,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:19:25,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:19:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:19:25,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:25,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1119 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:25,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:25,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:25,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:26,188 INFO L124 PetriNetUnfolderBase]: 4412/6869 cut-off events. [2024-06-04 14:19:26,189 INFO L125 PetriNetUnfolderBase]: For 48146/48464 co-relation queries the response was YES. [2024-06-04 14:19:26,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31285 conditions, 6869 events. 4412/6869 cut-off events. For 48146/48464 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42869 event pairs, 1542 based on Foata normal form. 60/6859 useless extension candidates. Maximal degree in co-relation 31239. Up to 6043 conditions per place. [2024-06-04 14:19:26,239 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-04 14:19:26,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1459 flow [2024-06-04 14:19:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-04 14:19:26,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-04 14:19:26,241 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1119 flow. Second operand 6 states and 183 transitions. [2024-06-04 14:19:26,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1459 flow [2024-06-04 14:19:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1377 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:26,353 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1097 flow [2024-06-04 14:19:26,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-04 14:19:26,354 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-06-04 14:19:26,354 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1097 flow [2024-06-04 14:19:26,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:26,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:26,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:26,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:19:26,355 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:26,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash -304391433, now seen corresponding path program 1 times [2024-06-04 14:19:26,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:26,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206417001] [2024-06-04 14:19:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206417001] [2024-06-04 14:19:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206417001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:26,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:26,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:26,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74095598] [2024-06-04 14:19:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:26,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:26,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1097 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:26,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:26,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:26,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:27,342 INFO L124 PetriNetUnfolderBase]: 5417/8126 cut-off events. [2024-06-04 14:19:27,342 INFO L125 PetriNetUnfolderBase]: For 53881/54166 co-relation queries the response was YES. [2024-06-04 14:19:27,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36571 conditions, 8126 events. 5417/8126 cut-off events. For 53881/54166 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49172 event pairs, 1736 based on Foata normal form. 36/8063 useless extension candidates. Maximal degree in co-relation 36524. Up to 7342 conditions per place. [2024-06-04 14:19:27,411 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 41 changer transitions 0/141 dead transitions. [2024-06-04 14:19:27,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1469 flow [2024-06-04 14:19:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-04 14:19:27,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-06-04 14:19:27,413 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1097 flow. Second operand 5 states and 157 transitions. [2024-06-04 14:19:27,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1469 flow [2024-06-04 14:19:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 141 transitions, 1413 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:27,517 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1191 flow [2024-06-04 14:19:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-04 14:19:27,518 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-04 14:19:27,518 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1191 flow [2024-06-04 14:19:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:27,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:27,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:19:27,519 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:27,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash -189100263, now seen corresponding path program 2 times [2024-06-04 14:19:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822342425] [2024-06-04 14:19:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822342425] [2024-06-04 14:19:27,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822342425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:27,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:27,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386382155] [2024-06-04 14:19:27,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:27,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:27,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:27,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:27,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:27,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:27,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:28,464 INFO L124 PetriNetUnfolderBase]: 5484/8231 cut-off events. [2024-06-04 14:19:28,464 INFO L125 PetriNetUnfolderBase]: For 62575/62990 co-relation queries the response was YES. [2024-06-04 14:19:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38995 conditions, 8231 events. 5484/8231 cut-off events. For 62575/62990 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49827 event pairs, 1740 based on Foata normal form. 66/8200 useless extension candidates. Maximal degree in co-relation 38947. Up to 7386 conditions per place. [2024-06-04 14:19:28,528 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 51 changer transitions 0/157 dead transitions. [2024-06-04 14:19:28,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 157 transitions, 1729 flow [2024-06-04 14:19:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-04 14:19:28,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 14:19:28,530 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1191 flow. Second operand 6 states and 186 transitions. [2024-06-04 14:19:28,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 157 transitions, 1729 flow [2024-06-04 14:19:28,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 157 transitions, 1627 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:28,640 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1316 flow [2024-06-04 14:19:28,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1316, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-04 14:19:28,641 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 53 predicate places. [2024-06-04 14:19:28,641 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1316 flow [2024-06-04 14:19:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:28,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:28,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:28,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:19:28,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:28,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash -188831493, now seen corresponding path program 3 times [2024-06-04 14:19:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:28,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346364844] [2024-06-04 14:19:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:28,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:28,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346364844] [2024-06-04 14:19:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346364844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:28,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:28,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:28,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080653665] [2024-06-04 14:19:28,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:28,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:28,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:28,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1316 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:28,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:28,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:28,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:29,713 INFO L124 PetriNetUnfolderBase]: 5500/8257 cut-off events. [2024-06-04 14:19:29,713 INFO L125 PetriNetUnfolderBase]: For 73048/73470 co-relation queries the response was YES. [2024-06-04 14:19:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41106 conditions, 8257 events. 5500/8257 cut-off events. For 73048/73470 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50089 event pairs, 1740 based on Foata normal form. 79/8239 useless extension candidates. Maximal degree in co-relation 41057. Up to 7403 conditions per place. [2024-06-04 14:19:29,768 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 93 selfloop transitions, 55 changer transitions 0/159 dead transitions. [2024-06-04 14:19:29,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 1812 flow [2024-06-04 14:19:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-04 14:19:29,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-04 14:19:29,770 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1316 flow. Second operand 6 states and 184 transitions. [2024-06-04 14:19:29,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 1812 flow [2024-06-04 14:19:29,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1713 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:29,885 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1398 flow [2024-06-04 14:19:29,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-06-04 14:19:29,886 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-04 14:19:29,886 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1398 flow [2024-06-04 14:19:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:29,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:29,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:19:29,887 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:29,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 341305113, now seen corresponding path program 4 times [2024-06-04 14:19:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:29,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457915622] [2024-06-04 14:19:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:30,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457915622] [2024-06-04 14:19:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457915622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:30,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:30,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783077709] [2024-06-04 14:19:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:30,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:30,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1398 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:30,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:30,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:30,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:30,942 INFO L124 PetriNetUnfolderBase]: 5458/8195 cut-off events. [2024-06-04 14:19:30,943 INFO L125 PetriNetUnfolderBase]: For 77086/77493 co-relation queries the response was YES. [2024-06-04 14:19:30,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41208 conditions, 8195 events. 5458/8195 cut-off events. For 77086/77493 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49693 event pairs, 1736 based on Foata normal form. 26/8124 useless extension candidates. Maximal degree in co-relation 41157. Up to 7400 conditions per place. [2024-06-04 14:19:31,007 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 103 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-06-04 14:19:31,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1756 flow [2024-06-04 14:19:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-04 14:19:31,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-04 14:19:31,009 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1398 flow. Second operand 5 states and 159 transitions. [2024-06-04 14:19:31,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1756 flow [2024-06-04 14:19:31,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1601 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:31,162 INFO L231 Difference]: Finished difference. Result has 112 places, 129 transitions, 1339 flow [2024-06-04 14:19:31,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=112, PETRI_TRANSITIONS=129} [2024-06-04 14:19:31,163 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-04 14:19:31,163 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 129 transitions, 1339 flow [2024-06-04 14:19:31,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:31,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:31,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:19:31,164 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:31,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1171899383, now seen corresponding path program 1 times [2024-06-04 14:19:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601330342] [2024-06-04 14:19:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:31,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:31,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601330342] [2024-06-04 14:19:31,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601330342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:31,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:31,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281230531] [2024-06-04 14:19:31,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:31,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:31,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:31,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:31,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 129 transitions, 1339 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) [2024-06-04 14:19:31,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:31,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:31,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:32,153 INFO L124 PetriNetUnfolderBase]: 5402/8121 cut-off events. [2024-06-04 14:19:32,153 INFO L125 PetriNetUnfolderBase]: For 87867/87990 co-relation queries the response was YES. [2024-06-04 14:19:32,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 8121 events. 5402/8121 cut-off events. For 87867/87990 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49638 event pairs, 1832 based on Foata normal form. 19/7959 useless extension candidates. Maximal degree in co-relation 39900. Up to 7236 conditions per place. [2024-06-04 14:19:32,221 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-04 14:19:32,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1651 flow [2024-06-04 14:19:32,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:19:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:19:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-04 14:19:32,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 14:19:32,223 INFO L175 Difference]: Start difference. First operand has 112 places, 129 transitions, 1339 flow. Second operand 4 states and 124 transitions. [2024-06-04 14:19:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1651 flow [2024-06-04 14:19:32,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1536 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:32,368 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1352 flow [2024-06-04 14:19:32,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1352, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-04 14:19:32,369 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 58 predicate places. [2024-06-04 14:19:32,369 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1352 flow [2024-06-04 14:19:32,369 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) [2024-06-04 14:19:32,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:32,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:19:32,369 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:32,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2138120553, now seen corresponding path program 2 times [2024-06-04 14:19:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:32,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565735863] [2024-06-04 14:19:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:32,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:32,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565735863] [2024-06-04 14:19:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565735863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:32,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:32,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:32,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159756466] [2024-06-04 14:19:32,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:32,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:32,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:32,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1352 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) [2024-06-04 14:19:32,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:32,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:32,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:33,439 INFO L124 PetriNetUnfolderBase]: 5381/8133 cut-off events. [2024-06-04 14:19:33,439 INFO L125 PetriNetUnfolderBase]: For 94448/94571 co-relation queries the response was YES. [2024-06-04 14:19:33,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42149 conditions, 8133 events. 5381/8133 cut-off events. For 94448/94571 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50079 event pairs, 1820 based on Foata normal form. 16/7971 useless extension candidates. Maximal degree in co-relation 42096. Up to 7255 conditions per place. [2024-06-04 14:19:33,505 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 99 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-06-04 14:19:33,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1783 flow [2024-06-04 14:19:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-06-04 14:19:33,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-04 14:19:33,506 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1352 flow. Second operand 5 states and 145 transitions. [2024-06-04 14:19:33,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1783 flow [2024-06-04 14:19:33,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1692 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:33,664 INFO L231 Difference]: Finished difference. Result has 116 places, 148 transitions, 1526 flow [2024-06-04 14:19:33,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1526, PETRI_PLACES=116, PETRI_TRANSITIONS=148} [2024-06-04 14:19:33,664 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 63 predicate places. [2024-06-04 14:19:33,665 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 148 transitions, 1526 flow [2024-06-04 14:19:33,665 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) [2024-06-04 14:19:33,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:33,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:33,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:19:33,666 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:33,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2145918633, now seen corresponding path program 1 times [2024-06-04 14:19:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:33,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385035356] [2024-06-04 14:19:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:33,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:33,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:33,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385035356] [2024-06-04 14:19:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385035356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:33,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:33,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:33,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926592606] [2024-06-04 14:19:33,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:33,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:33,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:33,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:19:33,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 148 transitions, 1526 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:33,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:33,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:19:33,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:34,750 INFO L124 PetriNetUnfolderBase]: 5943/8855 cut-off events. [2024-06-04 14:19:34,751 INFO L125 PetriNetUnfolderBase]: For 93147/93147 co-relation queries the response was YES. [2024-06-04 14:19:34,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46585 conditions, 8855 events. 5943/8855 cut-off events. For 93147/93147 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52502 event pairs, 1941 based on Foata normal form. 1/8853 useless extension candidates. Maximal degree in co-relation 46529. Up to 8299 conditions per place. [2024-06-04 14:19:34,832 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 157 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-04 14:19:34,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 2157 flow [2024-06-04 14:19:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-04 14:19:34,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-04 14:19:34,833 INFO L175 Difference]: Start difference. First operand has 116 places, 148 transitions, 1526 flow. Second operand 5 states and 144 transitions. [2024-06-04 14:19:34,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 2157 flow [2024-06-04 14:19:35,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 2115 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:35,090 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 1765 flow [2024-06-04 14:19:35,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1765, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2024-06-04 14:19:35,091 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-04 14:19:35,091 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 1765 flow [2024-06-04 14:19:35,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:35,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:35,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:35,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:19:35,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:35,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:35,092 INFO L85 PathProgramCache]: Analyzing trace with hash 970593529, now seen corresponding path program 2 times [2024-06-04 14:19:35,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:35,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705176603] [2024-06-04 14:19:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:35,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:35,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705176603] [2024-06-04 14:19:35,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705176603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:35,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:35,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925555848] [2024-06-04 14:19:35,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:35,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:35,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:35,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:35,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:19:35,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 1765 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:35,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:35,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:19:35,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:36,073 INFO L124 PetriNetUnfolderBase]: 5939/8846 cut-off events. [2024-06-04 14:19:36,073 INFO L125 PetriNetUnfolderBase]: For 103082/103082 co-relation queries the response was YES. [2024-06-04 14:19:36,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48267 conditions, 8846 events. 5939/8846 cut-off events. For 103082/103082 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52401 event pairs, 1947 based on Foata normal form. 1/8844 useless extension candidates. Maximal degree in co-relation 48206. Up to 8295 conditions per place. [2024-06-04 14:19:36,285 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 150 selfloop transitions, 20 changer transitions 0/178 dead transitions. [2024-06-04 14:19:36,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 178 transitions, 2144 flow [2024-06-04 14:19:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 14:19:36,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-04 14:19:36,287 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 1765 flow. Second operand 5 states and 137 transitions. [2024-06-04 14:19:36,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 178 transitions, 2144 flow [2024-06-04 14:19:36,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2080 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:36,614 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1757 flow [2024-06-04 14:19:36,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1757, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-04 14:19:36,615 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-04 14:19:36,615 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1757 flow [2024-06-04 14:19:36,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:36,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:36,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:36,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:19:36,616 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:36,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash -518636055, now seen corresponding path program 1 times [2024-06-04 14:19:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753650116] [2024-06-04 14:19:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:36,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:36,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:36,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753650116] [2024-06-04 14:19:36,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753650116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:19:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646133784] [2024-06-04 14:19:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:36,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:19:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:36,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:19:36,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:19:36,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:19:36,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1757 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) [2024-06-04 14:19:36,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:36,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:19:36,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:37,663 INFO L124 PetriNetUnfolderBase]: 5419/8225 cut-off events. [2024-06-04 14:19:37,663 INFO L125 PetriNetUnfolderBase]: For 107918/107928 co-relation queries the response was YES. [2024-06-04 14:19:37,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44982 conditions, 8225 events. 5419/8225 cut-off events. For 107918/107928 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 50363 event pairs, 1875 based on Foata normal form. 14/8100 useless extension candidates. Maximal degree in co-relation 44918. Up to 7271 conditions per place. [2024-06-04 14:19:37,741 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-04 14:19:37,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2105 flow [2024-06-04 14:19:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-04 14:19:37,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-04 14:19:37,742 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1757 flow. Second operand 5 states and 143 transitions. [2024-06-04 14:19:37,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2105 flow [2024-06-04 14:19:37,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 182 transitions, 2070 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 14:19:37,976 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1797 flow [2024-06-04 14:19:37,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1797, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-04 14:19:37,976 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-06-04 14:19:37,976 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1797 flow [2024-06-04 14:19:37,977 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) [2024-06-04 14:19:37,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:37,977 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] [2024-06-04 14:19:37,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:19:37,977 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:37,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:37,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1095477370, now seen corresponding path program 1 times [2024-06-04 14:19:37,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:37,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475937796] [2024-06-04 14:19:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:37,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:38,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475937796] [2024-06-04 14:19:38,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475937796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:38,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:38,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:19:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467950007] [2024-06-04 14:19:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:19:38,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:19:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:19:38,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:38,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1797 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 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) [2024-06-04 14:19:38,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:38,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:38,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:39,138 INFO L124 PetriNetUnfolderBase]: 5644/8525 cut-off events. [2024-06-04 14:19:39,138 INFO L125 PetriNetUnfolderBase]: For 114530/114535 co-relation queries the response was YES. [2024-06-04 14:19:39,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47737 conditions, 8525 events. 5644/8525 cut-off events. For 114530/114535 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 51479 event pairs, 1938 based on Foata normal form. 6/8489 useless extension candidates. Maximal degree in co-relation 47671. Up to 7745 conditions per place. [2024-06-04 14:19:39,202 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 146 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-06-04 14:19:39,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 2280 flow [2024-06-04 14:19:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:19:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:19:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-04 14:19:39,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-04 14:19:39,204 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1797 flow. Second operand 5 states and 143 transitions. [2024-06-04 14:19:39,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 2280 flow [2024-06-04 14:19:39,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 2239 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:39,480 INFO L231 Difference]: Finished difference. Result has 137 places, 180 transitions, 1969 flow [2024-06-04 14:19:39,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1969, PETRI_PLACES=137, PETRI_TRANSITIONS=180} [2024-06-04 14:19:39,480 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-04 14:19:39,481 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 180 transitions, 1969 flow [2024-06-04 14:19:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 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) [2024-06-04 14:19:39,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:39,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:19:39,481 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:39,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash -957432802, now seen corresponding path program 1 times [2024-06-04 14:19:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566632596] [2024-06-04 14:19:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566632596] [2024-06-04 14:19:39,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566632596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:39,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:39,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339551231] [2024-06-04 14:19:39,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:39,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:39,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 180 transitions, 1969 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:39,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:39,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:39,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:40,924 INFO L124 PetriNetUnfolderBase]: 6515/10013 cut-off events. [2024-06-04 14:19:40,924 INFO L125 PetriNetUnfolderBase]: For 173329/173897 co-relation queries the response was YES. [2024-06-04 14:19:40,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60250 conditions, 10013 events. 6515/10013 cut-off events. For 173329/173897 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64646 event pairs, 1263 based on Foata normal form. 112/9940 useless extension candidates. Maximal degree in co-relation 60180. Up to 5174 conditions per place. [2024-06-04 14:19:41,046 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 159 selfloop transitions, 70 changer transitions 0/244 dead transitions. [2024-06-04 14:19:41,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 244 transitions, 2947 flow [2024-06-04 14:19:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-04 14:19:41,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-04 14:19:41,047 INFO L175 Difference]: Start difference. First operand has 137 places, 180 transitions, 1969 flow. Second operand 7 states and 230 transitions. [2024-06-04 14:19:41,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 244 transitions, 2947 flow [2024-06-04 14:19:41,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 244 transitions, 2905 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-04 14:19:41,478 INFO L231 Difference]: Finished difference. Result has 145 places, 185 transitions, 2209 flow [2024-06-04 14:19:41,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2209, PETRI_PLACES=145, PETRI_TRANSITIONS=185} [2024-06-04 14:19:41,479 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 92 predicate places. [2024-06-04 14:19:41,479 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 185 transitions, 2209 flow [2024-06-04 14:19:41,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:41,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:41,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:41,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:19:41,480 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:41,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1666592478, now seen corresponding path program 2 times [2024-06-04 14:19:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:41,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462317649] [2024-06-04 14:19:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:41,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:41,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462317649] [2024-06-04 14:19:41,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462317649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:41,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:41,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017002158] [2024-06-04 14:19:41,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:41,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:41,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 185 transitions, 2209 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:41,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:41,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:41,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:42,960 INFO L124 PetriNetUnfolderBase]: 6392/9845 cut-off events. [2024-06-04 14:19:42,960 INFO L125 PetriNetUnfolderBase]: For 178634/179183 co-relation queries the response was YES. [2024-06-04 14:19:43,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60740 conditions, 9845 events. 6392/9845 cut-off events. For 178634/179183 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63256 event pairs, 1611 based on Foata normal form. 56/9712 useless extension candidates. Maximal degree in co-relation 60666. Up to 8191 conditions per place. [2024-06-04 14:19:43,090 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 175 selfloop transitions, 33 changer transitions 0/223 dead transitions. [2024-06-04 14:19:43,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 2793 flow [2024-06-04 14:19:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 14:19:43,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-04 14:19:43,092 INFO L175 Difference]: Start difference. First operand has 145 places, 185 transitions, 2209 flow. Second operand 6 states and 185 transitions. [2024-06-04 14:19:43,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 2793 flow [2024-06-04 14:19:43,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 223 transitions, 2713 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:43,627 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2201 flow [2024-06-04 14:19:43,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2201, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-04 14:19:43,628 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 96 predicate places. [2024-06-04 14:19:43,628 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2201 flow [2024-06-04 14:19:43,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:43,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:43,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:19:43,629 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:43,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:43,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1644752734, now seen corresponding path program 3 times [2024-06-04 14:19:43,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:43,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382983831] [2024-06-04 14:19:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:43,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:43,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382983831] [2024-06-04 14:19:43,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382983831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:43,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:43,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:43,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979101138] [2024-06-04 14:19:43,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:43,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:43,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:43,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:43,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2201 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:43,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:43,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:43,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:45,064 INFO L124 PetriNetUnfolderBase]: 6695/10254 cut-off events. [2024-06-04 14:19:45,064 INFO L125 PetriNetUnfolderBase]: For 201247/201834 co-relation queries the response was YES. [2024-06-04 14:19:45,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63770 conditions, 10254 events. 6695/10254 cut-off events. For 201247/201834 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 66347 event pairs, 1958 based on Foata normal form. 156/10192 useless extension candidates. Maximal degree in co-relation 63694. Up to 6708 conditions per place. [2024-06-04 14:19:45,165 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 153 selfloop transitions, 63 changer transitions 0/231 dead transitions. [2024-06-04 14:19:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 231 transitions, 2962 flow [2024-06-04 14:19:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-04 14:19:45,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-04 14:19:45,166 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2201 flow. Second operand 6 states and 196 transitions. [2024-06-04 14:19:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 231 transitions, 2962 flow [2024-06-04 14:19:45,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2888 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:45,876 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2291 flow [2024-06-04 14:19:45,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2291, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-04 14:19:45,876 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-06-04 14:19:45,877 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2291 flow [2024-06-04 14:19:45,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:45,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:45,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:19:45,877 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:45,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1227681782, now seen corresponding path program 4 times [2024-06-04 14:19:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:45,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975261198] [2024-06-04 14:19:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:46,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:46,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975261198] [2024-06-04 14:19:46,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975261198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:46,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:46,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14929944] [2024-06-04 14:19:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:46,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:46,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:46,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:46,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:46,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2291 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:46,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:46,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:46,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:47,485 INFO L124 PetriNetUnfolderBase]: 6526/10019 cut-off events. [2024-06-04 14:19:47,485 INFO L125 PetriNetUnfolderBase]: For 201167/201806 co-relation queries the response was YES. [2024-06-04 14:19:47,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61757 conditions, 10019 events. 6526/10019 cut-off events. For 201167/201806 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 64778 event pairs, 2177 based on Foata normal form. 185/9996 useless extension candidates. Maximal degree in co-relation 61680. Up to 8164 conditions per place. [2024-06-04 14:19:47,591 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 150 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-06-04 14:19:47,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 220 transitions, 2853 flow [2024-06-04 14:19:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-04 14:19:47,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-06-04 14:19:47,592 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2291 flow. Second operand 6 states and 187 transitions. [2024-06-04 14:19:47,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 220 transitions, 2853 flow [2024-06-04 14:19:48,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 220 transitions, 2697 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:48,296 INFO L231 Difference]: Finished difference. Result has 152 places, 186 transitions, 2257 flow [2024-06-04 14:19:48,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2257, PETRI_PLACES=152, PETRI_TRANSITIONS=186} [2024-06-04 14:19:48,297 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 99 predicate places. [2024-06-04 14:19:48,297 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 186 transitions, 2257 flow [2024-06-04 14:19:48,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:48,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:48,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:48,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:19:48,298 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:48,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:48,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1344305576, now seen corresponding path program 5 times [2024-06-04 14:19:48,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:48,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956400444] [2024-06-04 14:19:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:48,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:48,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956400444] [2024-06-04 14:19:48,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956400444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:48,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:48,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080900296] [2024-06-04 14:19:48,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:48,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:48,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:48,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 186 transitions, 2257 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:48,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:48,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:48,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:49,908 INFO L124 PetriNetUnfolderBase]: 7231/11116 cut-off events. [2024-06-04 14:19:49,909 INFO L125 PetriNetUnfolderBase]: For 220149/220835 co-relation queries the response was YES. [2024-06-04 14:19:49,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68414 conditions, 11116 events. 7231/11116 cut-off events. For 220149/220835 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73782 event pairs, 2382 based on Foata normal form. 211/11100 useless extension candidates. Maximal degree in co-relation 68337. Up to 8656 conditions per place. [2024-06-04 14:19:50,022 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 155 selfloop transitions, 68 changer transitions 0/238 dead transitions. [2024-06-04 14:19:50,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 3057 flow [2024-06-04 14:19:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-04 14:19:50,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-04 14:19:50,024 INFO L175 Difference]: Start difference. First operand has 152 places, 186 transitions, 2257 flow. Second operand 7 states and 221 transitions. [2024-06-04 14:19:50,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 3057 flow [2024-06-04 14:19:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 238 transitions, 2914 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:19:50,661 INFO L231 Difference]: Finished difference. Result has 153 places, 188 transitions, 2318 flow [2024-06-04 14:19:50,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2318, PETRI_PLACES=153, PETRI_TRANSITIONS=188} [2024-06-04 14:19:50,662 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 100 predicate places. [2024-06-04 14:19:50,662 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 188 transitions, 2318 flow [2024-06-04 14:19:50,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:50,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:50,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:50,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:19:50,663 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:50,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1336687016, now seen corresponding path program 6 times [2024-06-04 14:19:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:50,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165636785] [2024-06-04 14:19:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165636785] [2024-06-04 14:19:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165636785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:50,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:50,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997587939] [2024-06-04 14:19:50,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:50,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:50,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 188 transitions, 2318 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:50,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:50,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:50,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:52,182 INFO L124 PetriNetUnfolderBase]: 7539/11574 cut-off events. [2024-06-04 14:19:52,183 INFO L125 PetriNetUnfolderBase]: For 229510/230235 co-relation queries the response was YES. [2024-06-04 14:19:52,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71061 conditions, 11574 events. 7539/11574 cut-off events. For 229510/230235 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 77502 event pairs, 2617 based on Foata normal form. 212/11539 useless extension candidates. Maximal degree in co-relation 70984. Up to 9877 conditions per place. [2024-06-04 14:19:52,301 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 147 selfloop transitions, 66 changer transitions 0/228 dead transitions. [2024-06-04 14:19:52,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 228 transitions, 2920 flow [2024-06-04 14:19:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-04 14:19:52,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-04 14:19:52,302 INFO L175 Difference]: Start difference. First operand has 153 places, 188 transitions, 2318 flow. Second operand 7 states and 212 transitions. [2024-06-04 14:19:52,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 228 transitions, 2920 flow [2024-06-04 14:19:52,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 228 transitions, 2818 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:52,967 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2388 flow [2024-06-04 14:19:52,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2388, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-04 14:19:52,968 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 104 predicate places. [2024-06-04 14:19:52,968 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2388 flow [2024-06-04 14:19:52,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:52,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:52,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:52,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:19:52,969 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:52,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1078399046, now seen corresponding path program 7 times [2024-06-04 14:19:52,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:52,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389928927] [2024-06-04 14:19:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:52,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:53,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:53,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389928927] [2024-06-04 14:19:53,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389928927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:53,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:53,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:53,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515905746] [2024-06-04 14:19:53,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:53,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:53,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:53,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:53,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2388 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:53,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:53,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:53,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:54,515 INFO L124 PetriNetUnfolderBase]: 7907/12118 cut-off events. [2024-06-04 14:19:54,515 INFO L125 PetriNetUnfolderBase]: For 241089/241730 co-relation queries the response was YES. [2024-06-04 14:19:54,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74293 conditions, 12118 events. 7907/12118 cut-off events. For 241089/241730 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 81643 event pairs, 2714 based on Foata normal form. 167/12048 useless extension candidates. Maximal degree in co-relation 74214. Up to 10411 conditions per place. [2024-06-04 14:19:54,644 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 145 selfloop transitions, 67 changer transitions 0/227 dead transitions. [2024-06-04 14:19:54,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 227 transitions, 2988 flow [2024-06-04 14:19:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-04 14:19:54,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:19:54,645 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2388 flow. Second operand 7 states and 210 transitions. [2024-06-04 14:19:54,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 227 transitions, 2988 flow [2024-06-04 14:19:55,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2852 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:55,359 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 2422 flow [2024-06-04 14:19:55,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-04 14:19:55,360 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-04 14:19:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 2422 flow [2024-06-04 14:19:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:19:55,361 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:55,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1576738392, now seen corresponding path program 8 times [2024-06-04 14:19:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270395206] [2024-06-04 14:19:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270395206] [2024-06-04 14:19:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270395206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:55,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:55,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390390802] [2024-06-04 14:19:55,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:55,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:55,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:55,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 2422 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:55,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:55,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:55,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:56,945 INFO L124 PetriNetUnfolderBase]: 7749/11822 cut-off events. [2024-06-04 14:19:56,946 INFO L125 PetriNetUnfolderBase]: For 235496/236254 co-relation queries the response was YES. [2024-06-04 14:19:57,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71563 conditions, 11822 events. 7749/11822 cut-off events. For 235496/236254 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 79064 event pairs, 2586 based on Foata normal form. 140/11700 useless extension candidates. Maximal degree in co-relation 71483. Up to 10061 conditions per place. [2024-06-04 14:19:57,060 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 158 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-04 14:19:57,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2992 flow [2024-06-04 14:19:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:19:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:19:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-04 14:19:57,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-04 14:19:57,061 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 2422 flow. Second operand 6 states and 191 transitions. [2024-06-04 14:19:57,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2992 flow [2024-06-04 14:19:57,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 228 transitions, 2846 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:57,683 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 2398 flow [2024-06-04 14:19:57,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2398, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2024-06-04 14:19:57,683 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 107 predicate places. [2024-06-04 14:19:57,683 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 2398 flow [2024-06-04 14:19:57,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:57,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:57,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:57,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:19:57,684 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:19:57,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1219620960, now seen corresponding path program 1 times [2024-06-04 14:19:57,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:57,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953304412] [2024-06-04 14:19:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:57,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:57,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953304412] [2024-06-04 14:19:57,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953304412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:57,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:57,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148877323] [2024-06-04 14:19:57,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:57,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:19:57,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 2398 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:57,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:57,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:19:57,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:59,288 INFO L124 PetriNetUnfolderBase]: 8261/12724 cut-off events. [2024-06-04 14:19:59,288 INFO L125 PetriNetUnfolderBase]: For 254920/255570 co-relation queries the response was YES. [2024-06-04 14:19:59,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77056 conditions, 12724 events. 8261/12724 cut-off events. For 254920/255570 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 86696 event pairs, 2393 based on Foata normal form. 132/12593 useless extension candidates. Maximal degree in co-relation 76975. Up to 6218 conditions per place. [2024-06-04 14:19:59,440 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 151 selfloop transitions, 82 changer transitions 0/248 dead transitions. [2024-06-04 14:19:59,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 248 transitions, 3284 flow [2024-06-04 14:19:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-04 14:19:59,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 14:19:59,442 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 2398 flow. Second operand 7 states and 225 transitions. [2024-06-04 14:19:59,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 248 transitions, 3284 flow [2024-06-04 14:20:00,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 248 transitions, 3162 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:20:00,130 INFO L231 Difference]: Finished difference. Result has 162 places, 192 transitions, 2508 flow [2024-06-04 14:20:00,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2508, PETRI_PLACES=162, PETRI_TRANSITIONS=192} [2024-06-04 14:20:00,131 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 109 predicate places. [2024-06-04 14:20:00,131 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 192 transitions, 2508 flow [2024-06-04 14:20:00,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:00,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:00,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:00,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:20:00,132 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:00,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1219352190, now seen corresponding path program 2 times [2024-06-04 14:20:00,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:00,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420060838] [2024-06-04 14:20:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:00,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:00,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:00,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420060838] [2024-06-04 14:20:00,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420060838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:00,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:00,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:00,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748031385] [2024-06-04 14:20:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:00,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:00,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:00,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:20:00,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 192 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:00,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:00,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:20:00,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:01,860 INFO L124 PetriNetUnfolderBase]: 8430/12991 cut-off events. [2024-06-04 14:20:01,860 INFO L125 PetriNetUnfolderBase]: For 274738/275502 co-relation queries the response was YES. [2024-06-04 14:20:01,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79639 conditions, 12991 events. 8430/12991 cut-off events. For 274738/275502 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 89076 event pairs, 2371 based on Foata normal form. 153/12863 useless extension candidates. Maximal degree in co-relation 79557. Up to 6240 conditions per place. [2024-06-04 14:20:01,992 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 149 selfloop transitions, 83 changer transitions 0/247 dead transitions. [2024-06-04 14:20:01,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 247 transitions, 3372 flow [2024-06-04 14:20:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-04 14:20:01,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371428571428571 [2024-06-04 14:20:01,993 INFO L175 Difference]: Start difference. First operand has 162 places, 192 transitions, 2508 flow. Second operand 7 states and 223 transitions. [2024-06-04 14:20:01,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 247 transitions, 3372 flow [2024-06-04 14:20:02,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 247 transitions, 3180 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:02,828 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 2520 flow [2024-06-04 14:20:02,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2520, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-04 14:20:02,829 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 112 predicate places. [2024-06-04 14:20:02,829 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 2520 flow [2024-06-04 14:20:02,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:02,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:02,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:02,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:20:02,829 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:02,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1130786430, now seen corresponding path program 3 times [2024-06-04 14:20:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:02,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475959907] [2024-06-04 14:20:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:02,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:03,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475959907] [2024-06-04 14:20:03,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475959907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:03,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:03,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:03,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178613333] [2024-06-04 14:20:03,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:03,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:03,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:03,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:20:03,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 2520 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:03,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:03,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:20:03,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:04,556 INFO L124 PetriNetUnfolderBase]: 8677/13456 cut-off events. [2024-06-04 14:20:04,557 INFO L125 PetriNetUnfolderBase]: For 290216/291008 co-relation queries the response was YES. [2024-06-04 14:20:04,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82038 conditions, 13456 events. 8677/13456 cut-off events. For 290216/291008 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 93924 event pairs, 3017 based on Foata normal form. 169/13302 useless extension candidates. Maximal degree in co-relation 81955. Up to 10014 conditions per place. [2024-06-04 14:20:04,711 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 152 selfloop transitions, 71 changer transitions 0/238 dead transitions. [2024-06-04 14:20:04,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 3206 flow [2024-06-04 14:20:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-04 14:20:04,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 14:20:04,713 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 2520 flow. Second operand 7 states and 215 transitions. [2024-06-04 14:20:04,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 3206 flow [2024-06-04 14:20:05,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3074 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:05,596 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 2564 flow [2024-06-04 14:20:05,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2564, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-06-04 14:20:05,597 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-04 14:20:05,597 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 2564 flow [2024-06-04 14:20:05,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:05,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:05,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:05,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:20:05,598 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:05,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1576922842, now seen corresponding path program 4 times [2024-06-04 14:20:05,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:05,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171137611] [2024-06-04 14:20:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:05,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:05,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171137611] [2024-06-04 14:20:05,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171137611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:05,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:05,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:05,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917728241] [2024-06-04 14:20:05,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:05,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:05,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:05,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:05,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 14:20:05,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 2564 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:05,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:05,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 14:20:05,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:07,391 INFO L124 PetriNetUnfolderBase]: 8579/13216 cut-off events. [2024-06-04 14:20:07,391 INFO L125 PetriNetUnfolderBase]: For 283287/284029 co-relation queries the response was YES. [2024-06-04 14:20:07,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79386 conditions, 13216 events. 8579/13216 cut-off events. For 283287/284029 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 90987 event pairs, 2437 based on Foata normal form. 114/12991 useless extension candidates. Maximal degree in co-relation 79302. Up to 9801 conditions per place. [2024-06-04 14:20:07,533 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 160 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-04 14:20:07,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 3220 flow [2024-06-04 14:20:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-04 14:20:07,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-04 14:20:07,535 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 2564 flow. Second operand 6 states and 196 transitions. [2024-06-04 14:20:07,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 3220 flow [2024-06-04 14:20:08,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 3066 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 14:20:08,378 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2547 flow [2024-06-04 14:20:08,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2547, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2024-06-04 14:20:08,378 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 116 predicate places. [2024-06-04 14:20:08,378 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2547 flow [2024-06-04 14:20:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:08,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:08,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:08,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:20:08,379 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:08,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -924326040, now seen corresponding path program 1 times [2024-06-04 14:20:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:08,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295895059] [2024-06-04 14:20:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295895059] [2024-06-04 14:20:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295895059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:08,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:08,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:08,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303639005] [2024-06-04 14:20:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:08,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:08,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2547 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:08,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:08,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:08,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:10,117 INFO L124 PetriNetUnfolderBase]: 9585/14508 cut-off events. [2024-06-04 14:20:10,117 INFO L125 PetriNetUnfolderBase]: For 257538/257545 co-relation queries the response was YES. [2024-06-04 14:20:10,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84249 conditions, 14508 events. 9585/14508 cut-off events. For 257538/257545 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 97359 event pairs, 3637 based on Foata normal form. 7/14512 useless extension candidates. Maximal degree in co-relation 84164. Up to 13575 conditions per place. [2024-06-04 14:20:10,290 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 180 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2024-06-04 14:20:10,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 227 transitions, 3263 flow [2024-06-04 14:20:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 14:20:10,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-04 14:20:10,291 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2547 flow. Second operand 7 states and 189 transitions. [2024-06-04 14:20:10,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 227 transitions, 3263 flow [2024-06-04 14:20:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 3087 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 14:20:11,138 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2645 flow [2024-06-04 14:20:11,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2645, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-04 14:20:11,138 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 118 predicate places. [2024-06-04 14:20:11,139 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2645 flow [2024-06-04 14:20:11,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:11,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:11,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:11,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:20:11,139 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:11,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash 526842240, now seen corresponding path program 2 times [2024-06-04 14:20:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:11,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55167949] [2024-06-04 14:20:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:11,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:11,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55167949] [2024-06-04 14:20:11,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55167949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:11,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:11,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:11,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192006782] [2024-06-04 14:20:11,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:11,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:11,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:11,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2645 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:11,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:11,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:11,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:12,774 INFO L124 PetriNetUnfolderBase]: 9581/14473 cut-off events. [2024-06-04 14:20:12,774 INFO L125 PetriNetUnfolderBase]: For 265533/265550 co-relation queries the response was YES. [2024-06-04 14:20:12,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85007 conditions, 14473 events. 9581/14473 cut-off events. For 265533/265550 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 97069 event pairs, 3556 based on Foata normal form. 17/14485 useless extension candidates. Maximal degree in co-relation 84920. Up to 13571 conditions per place. [2024-06-04 14:20:12,937 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 173 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-06-04 14:20:12,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 218 transitions, 3095 flow [2024-06-04 14:20:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:20:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:20:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-04 14:20:12,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-04 14:20:12,938 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2645 flow. Second operand 5 states and 140 transitions. [2024-06-04 14:20:12,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 218 transitions, 3095 flow [2024-06-04 14:20:13,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 218 transitions, 2961 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:13,679 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2597 flow [2024-06-04 14:20:13,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2597, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-04 14:20:13,680 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-04 14:20:13,680 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2597 flow [2024-06-04 14:20:13,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:13,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:13,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:20:13,680 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:13,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 526855136, now seen corresponding path program 1 times [2024-06-04 14:20:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894767916] [2024-06-04 14:20:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:13,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:13,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894767916] [2024-06-04 14:20:13,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894767916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:13,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:13,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:13,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599279436] [2024-06-04 14:20:13,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:13,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:13,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:20:13,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2597 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:13,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:13,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:20:13,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:15,384 INFO L124 PetriNetUnfolderBase]: 9249/13962 cut-off events. [2024-06-04 14:20:15,384 INFO L125 PetriNetUnfolderBase]: For 311549/311714 co-relation queries the response was YES. [2024-06-04 14:20:15,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83508 conditions, 13962 events. 9249/13962 cut-off events. For 311549/311714 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 94626 event pairs, 3350 based on Foata normal form. 94/13588 useless extension candidates. Maximal degree in co-relation 83420. Up to 12410 conditions per place. [2024-06-04 14:20:15,530 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 132 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-04 14:20:15,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 227 transitions, 3081 flow [2024-06-04 14:20:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:20:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:20:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-04 14:20:15,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-04 14:20:15,531 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2597 flow. Second operand 5 states and 152 transitions. [2024-06-04 14:20:15,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 227 transitions, 3081 flow [2024-06-04 14:20:16,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 3000 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 14:20:16,441 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 2680 flow [2024-06-04 14:20:16,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2680, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-04 14:20:16,441 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-04 14:20:16,442 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 2680 flow [2024-06-04 14:20:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:16,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:16,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:20:16,442 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:16,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash 643523272, now seen corresponding path program 3 times [2024-06-04 14:20:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:16,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664333985] [2024-06-04 14:20:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:16,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:16,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664333985] [2024-06-04 14:20:16,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664333985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:16,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:16,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:16,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523037203] [2024-06-04 14:20:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:16,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:16,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:16,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:16,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 2680 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:16,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:16,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:16,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:18,147 INFO L124 PetriNetUnfolderBase]: 9916/14958 cut-off events. [2024-06-04 14:20:18,147 INFO L125 PetriNetUnfolderBase]: For 276868/276875 co-relation queries the response was YES. [2024-06-04 14:20:18,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89504 conditions, 14958 events. 9916/14958 cut-off events. For 276868/276875 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100572 event pairs, 3706 based on Foata normal form. 7/14960 useless extension candidates. Maximal degree in co-relation 89416. Up to 14020 conditions per place. [2024-06-04 14:20:18,325 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 186 selfloop transitions, 47 changer transitions 0/241 dead transitions. [2024-06-04 14:20:18,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 241 transitions, 3436 flow [2024-06-04 14:20:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-04 14:20:18,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-04 14:20:18,326 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 2680 flow. Second operand 6 states and 168 transitions. [2024-06-04 14:20:18,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 241 transitions, 3436 flow [2024-06-04 14:20:19,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 241 transitions, 3328 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:19,154 INFO L231 Difference]: Finished difference. Result has 177 places, 221 transitions, 2878 flow [2024-06-04 14:20:19,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2878, PETRI_PLACES=177, PETRI_TRANSITIONS=221} [2024-06-04 14:20:19,154 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 124 predicate places. [2024-06-04 14:20:19,154 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 221 transitions, 2878 flow [2024-06-04 14:20:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:19,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:20:19,155 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:19,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -403433654, now seen corresponding path program 4 times [2024-06-04 14:20:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962258233] [2024-06-04 14:20:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:19,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:19,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962258233] [2024-06-04 14:20:19,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962258233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:19,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:19,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:19,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842086845] [2024-06-04 14:20:19,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:19,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:19,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:19,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:19,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 221 transitions, 2878 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:19,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:19,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:19,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:21,031 INFO L124 PetriNetUnfolderBase]: 9923/14961 cut-off events. [2024-06-04 14:20:21,032 INFO L125 PetriNetUnfolderBase]: For 280054/280071 co-relation queries the response was YES. [2024-06-04 14:20:21,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89532 conditions, 14961 events. 9923/14961 cut-off events. For 280054/280071 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100471 event pairs, 3622 based on Foata normal form. 17/14973 useless extension candidates. Maximal degree in co-relation 89442. Up to 14028 conditions per place. [2024-06-04 14:20:21,179 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 180 selfloop transitions, 51 changer transitions 0/239 dead transitions. [2024-06-04 14:20:21,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 239 transitions, 3512 flow [2024-06-04 14:20:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 14:20:21,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-04 14:20:21,180 INFO L175 Difference]: Start difference. First operand has 177 places, 221 transitions, 2878 flow. Second operand 6 states and 162 transitions. [2024-06-04 14:20:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 239 transitions, 3512 flow [2024-06-04 14:20:22,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 239 transitions, 3418 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-04 14:20:22,041 INFO L231 Difference]: Finished difference. Result has 182 places, 225 transitions, 2965 flow [2024-06-04 14:20:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2965, PETRI_PLACES=182, PETRI_TRANSITIONS=225} [2024-06-04 14:20:22,041 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 129 predicate places. [2024-06-04 14:20:22,041 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 225 transitions, 2965 flow [2024-06-04 14:20:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:22,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:22,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:20:22,042 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:22,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1652961484, now seen corresponding path program 5 times [2024-06-04 14:20:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:22,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553236940] [2024-06-04 14:20:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:22,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:22,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553236940] [2024-06-04 14:20:22,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553236940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:22,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:22,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133930169] [2024-06-04 14:20:22,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:22,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:22,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:22,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 225 transitions, 2965 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:22,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:22,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:23,804 INFO L124 PetriNetUnfolderBase]: 9919/14952 cut-off events. [2024-06-04 14:20:23,804 INFO L125 PetriNetUnfolderBase]: For 280494/280511 co-relation queries the response was YES. [2024-06-04 14:20:23,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88246 conditions, 14952 events. 9919/14952 cut-off events. For 280494/280511 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100292 event pairs, 3618 based on Foata normal form. 17/14964 useless extension candidates. Maximal degree in co-relation 88153. Up to 14024 conditions per place. [2024-06-04 14:20:23,975 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2024-06-04 14:20:23,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 238 transitions, 3457 flow [2024-06-04 14:20:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-04 14:20:23,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-04 14:20:23,976 INFO L175 Difference]: Start difference. First operand has 182 places, 225 transitions, 2965 flow. Second operand 6 states and 161 transitions. [2024-06-04 14:20:23,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 238 transitions, 3457 flow [2024-06-04 14:20:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 238 transitions, 3270 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:24,996 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2887 flow [2024-06-04 14:20:24,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2887, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-04 14:20:24,997 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-04 14:20:24,997 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2887 flow [2024-06-04 14:20:24,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:24,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:24,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:20:24,998 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:24,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:24,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1315155488, now seen corresponding path program 2 times [2024-06-04 14:20:24,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147344421] [2024-06-04 14:20:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:24,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:25,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:25,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147344421] [2024-06-04 14:20:25,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147344421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:25,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:25,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:25,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352833077] [2024-06-04 14:20:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:25,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:20:25,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2887 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:25,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:25,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:20:25,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:26,708 INFO L124 PetriNetUnfolderBase]: 9358/14129 cut-off events. [2024-06-04 14:20:26,708 INFO L125 PetriNetUnfolderBase]: For 312258/312415 co-relation queries the response was YES. [2024-06-04 14:20:26,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85096 conditions, 14129 events. 9358/14129 cut-off events. For 312258/312415 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95689 event pairs, 3358 based on Foata normal form. 50/13706 useless extension candidates. Maximal degree in co-relation 85002. Up to 12793 conditions per place. [2024-06-04 14:20:26,859 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 155 selfloop transitions, 38 changer transitions 0/244 dead transitions. [2024-06-04 14:20:26,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 244 transitions, 3361 flow [2024-06-04 14:20:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-04 14:20:26,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 14:20:26,864 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2887 flow. Second operand 6 states and 170 transitions. [2024-06-04 14:20:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 244 transitions, 3361 flow [2024-06-04 14:20:27,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 244 transitions, 3213 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:20:27,767 INFO L231 Difference]: Finished difference. Result has 186 places, 227 transitions, 2850 flow [2024-06-04 14:20:27,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2850, PETRI_PLACES=186, PETRI_TRANSITIONS=227} [2024-06-04 14:20:27,768 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 133 predicate places. [2024-06-04 14:20:27,768 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 227 transitions, 2850 flow [2024-06-04 14:20:27,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:27,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:27,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:27,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:20:27,769 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:27,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1333249568, now seen corresponding path program 3 times [2024-06-04 14:20:27,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:27,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156806238] [2024-06-04 14:20:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:27,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156806238] [2024-06-04 14:20:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156806238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690022773] [2024-06-04 14:20:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:27,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:27,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 14:20:27,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 227 transitions, 2850 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:27,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:27,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 14:20:27,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:29,538 INFO L124 PetriNetUnfolderBase]: 9373/14128 cut-off events. [2024-06-04 14:20:29,538 INFO L125 PetriNetUnfolderBase]: For 319462/319579 co-relation queries the response was YES. [2024-06-04 14:20:29,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86265 conditions, 14128 events. 9373/14128 cut-off events. For 319462/319579 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95574 event pairs, 3340 based on Foata normal form. 44/13710 useless extension candidates. Maximal degree in co-relation 86171. Up to 12680 conditions per place. [2024-06-04 14:20:29,708 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 156 selfloop transitions, 43 changer transitions 0/250 dead transitions. [2024-06-04 14:20:29,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 250 transitions, 3374 flow [2024-06-04 14:20:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-04 14:20:29,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-04 14:20:29,710 INFO L175 Difference]: Start difference. First operand has 186 places, 227 transitions, 2850 flow. Second operand 6 states and 172 transitions. [2024-06-04 14:20:29,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 250 transitions, 3374 flow [2024-06-04 14:20:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 3293 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:30,991 INFO L231 Difference]: Finished difference. Result has 189 places, 230 transitions, 2923 flow [2024-06-04 14:20:30,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2923, PETRI_PLACES=189, PETRI_TRANSITIONS=230} [2024-06-04 14:20:30,992 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-04 14:20:30,992 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 230 transitions, 2923 flow [2024-06-04 14:20:30,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:30,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:30,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:20:30,992 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:30,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1691019608, now seen corresponding path program 1 times [2024-06-04 14:20:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356162388] [2024-06-04 14:20:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:30,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:31,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:31,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356162388] [2024-06-04 14:20:31,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356162388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:31,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:31,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124579507] [2024-06-04 14:20:31,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:31,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:31,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:31,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 230 transitions, 2923 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:31,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:31,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:31,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:33,378 INFO L124 PetriNetUnfolderBase]: 10126/15261 cut-off events. [2024-06-04 14:20:33,378 INFO L125 PetriNetUnfolderBase]: For 325527/325527 co-relation queries the response was YES. [2024-06-04 14:20:33,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92956 conditions, 15261 events. 10126/15261 cut-off events. For 325527/325527 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 102598 event pairs, 3580 based on Foata normal form. 6/15264 useless extension candidates. Maximal degree in co-relation 92860. Up to 14266 conditions per place. [2024-06-04 14:20:33,535 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 236 selfloop transitions, 25 changer transitions 0/269 dead transitions. [2024-06-04 14:20:33,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 269 transitions, 3730 flow [2024-06-04 14:20:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-04 14:20:33,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:20:33,537 INFO L175 Difference]: Start difference. First operand has 189 places, 230 transitions, 2923 flow. Second operand 6 states and 175 transitions. [2024-06-04 14:20:33,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 269 transitions, 3730 flow [2024-06-04 14:20:34,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 269 transitions, 3646 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:34,645 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 3008 flow [2024-06-04 14:20:34,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3008, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-04 14:20:34,645 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-06-04 14:20:34,645 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 3008 flow [2024-06-04 14:20:34,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:34,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:34,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:34,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:20:34,646 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:34,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:34,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1682448728, now seen corresponding path program 2 times [2024-06-04 14:20:34,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:34,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884280817] [2024-06-04 14:20:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:34,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:34,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884280817] [2024-06-04 14:20:34,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884280817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:34,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095298544] [2024-06-04 14:20:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:34,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:34,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:34,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 3008 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:34,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:34,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:34,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:37,066 INFO L124 PetriNetUnfolderBase]: 10170/15329 cut-off events. [2024-06-04 14:20:37,066 INFO L125 PetriNetUnfolderBase]: For 342118/342118 co-relation queries the response was YES. [2024-06-04 14:20:37,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94083 conditions, 15329 events. 10170/15329 cut-off events. For 342118/342118 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103158 event pairs, 3646 based on Foata normal form. 8/15334 useless extension candidates. Maximal degree in co-relation 93985. Up to 14402 conditions per place. [2024-06-04 14:20:37,365 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 231 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2024-06-04 14:20:37,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 261 transitions, 3632 flow [2024-06-04 14:20:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-04 14:20:37,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2024-06-04 14:20:37,369 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 3008 flow. Second operand 6 states and 166 transitions. [2024-06-04 14:20:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 261 transitions, 3632 flow [2024-06-04 14:20:38,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 3575 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:20:38,528 INFO L231 Difference]: Finished difference. Result has 197 places, 238 transitions, 3043 flow [2024-06-04 14:20:38,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3043, PETRI_PLACES=197, PETRI_TRANSITIONS=238} [2024-06-04 14:20:38,528 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 144 predicate places. [2024-06-04 14:20:38,529 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 238 transitions, 3043 flow [2024-06-04 14:20:38,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:38,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:38,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:38,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:20:38,529 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:38,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash 637820264, now seen corresponding path program 1 times [2024-06-04 14:20:38,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:38,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692181115] [2024-06-04 14:20:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:38,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692181115] [2024-06-04 14:20:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692181115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588344160] [2024-06-04 14:20:38,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:38,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:38,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 238 transitions, 3043 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:38,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:38,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:38,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:41,209 INFO L124 PetriNetUnfolderBase]: 10188/15344 cut-off events. [2024-06-04 14:20:41,209 INFO L125 PetriNetUnfolderBase]: For 348682/348686 co-relation queries the response was YES. [2024-06-04 14:20:41,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94462 conditions, 15344 events. 10188/15344 cut-off events. For 348682/348686 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103249 event pairs, 3626 based on Foata normal form. 5/15345 useless extension candidates. Maximal degree in co-relation 94362. Up to 14410 conditions per place. [2024-06-04 14:20:41,355 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 231 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-06-04 14:20:41,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 4019 flow [2024-06-04 14:20:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-04 14:20:41,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-04 14:20:41,357 INFO L175 Difference]: Start difference. First operand has 197 places, 238 transitions, 3043 flow. Second operand 6 states and 172 transitions. [2024-06-04 14:20:41,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 4019 flow [2024-06-04 14:20:42,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 278 transitions, 3969 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:42,601 INFO L231 Difference]: Finished difference. Result has 201 places, 253 transitions, 3328 flow [2024-06-04 14:20:42,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3328, PETRI_PLACES=201, PETRI_TRANSITIONS=253} [2024-06-04 14:20:42,601 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 148 predicate places. [2024-06-04 14:20:42,601 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 253 transitions, 3328 flow [2024-06-04 14:20:42,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:42,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:42,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:42,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:20:42,602 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:42,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash 643534184, now seen corresponding path program 2 times [2024-06-04 14:20:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:42,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245048074] [2024-06-04 14:20:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245048074] [2024-06-04 14:20:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245048074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:42,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:42,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:42,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521623673] [2024-06-04 14:20:42,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:42,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:42,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:42,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 253 transitions, 3328 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:42,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:42,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:42,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:45,144 INFO L124 PetriNetUnfolderBase]: 10206/15369 cut-off events. [2024-06-04 14:20:45,144 INFO L125 PetriNetUnfolderBase]: For 374067/374071 co-relation queries the response was YES. [2024-06-04 14:20:45,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97430 conditions, 15369 events. 10206/15369 cut-off events. For 374067/374071 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103358 event pairs, 3626 based on Foata normal form. 5/15370 useless extension candidates. Maximal degree in co-relation 97327. Up to 14430 conditions per place. [2024-06-04 14:20:45,309 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 228 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2024-06-04 14:20:45,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 283 transitions, 4239 flow [2024-06-04 14:20:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-04 14:20:45,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-06-04 14:20:45,311 INFO L175 Difference]: Start difference. First operand has 201 places, 253 transitions, 3328 flow. Second operand 6 states and 169 transitions. [2024-06-04 14:20:45,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 283 transitions, 4239 flow [2024-06-04 14:20:46,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 283 transitions, 4122 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-04 14:20:46,768 INFO L231 Difference]: Finished difference. Result has 207 places, 262 transitions, 3485 flow [2024-06-04 14:20:46,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3485, PETRI_PLACES=207, PETRI_TRANSITIONS=262} [2024-06-04 14:20:46,768 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 154 predicate places. [2024-06-04 14:20:46,769 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 262 transitions, 3485 flow [2024-06-04 14:20:46,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:46,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:46,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:20:46,769 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:46,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:46,770 INFO L85 PathProgramCache]: Analyzing trace with hash -403425718, now seen corresponding path program 3 times [2024-06-04 14:20:46,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:46,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747270077] [2024-06-04 14:20:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:46,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:46,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747270077] [2024-06-04 14:20:46,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747270077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:46,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:46,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859425981] [2024-06-04 14:20:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:46,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:46,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:46,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 262 transitions, 3485 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:46,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:46,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:46,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:49,188 INFO L124 PetriNetUnfolderBase]: 10180/15321 cut-off events. [2024-06-04 14:20:49,188 INFO L125 PetriNetUnfolderBase]: For 385285/385285 co-relation queries the response was YES. [2024-06-04 14:20:49,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97262 conditions, 15321 events. 10180/15321 cut-off events. For 385285/385285 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102886 event pairs, 3614 based on Foata normal form. 8/15326 useless extension candidates. Maximal degree in co-relation 97156. Up to 14414 conditions per place. [2024-06-04 14:20:49,359 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 250 selfloop transitions, 22 changer transitions 0/280 dead transitions. [2024-06-04 14:20:49,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 280 transitions, 4110 flow [2024-06-04 14:20:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:20:49,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 14:20:49,361 INFO L175 Difference]: Start difference. First operand has 207 places, 262 transitions, 3485 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:20:49,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 280 transitions, 4110 flow [2024-06-04 14:20:50,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 4020 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 14:20:50,960 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3460 flow [2024-06-04 14:20:50,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3460, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-04 14:20:50,961 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 158 predicate places. [2024-06-04 14:20:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3460 flow [2024-06-04 14:20:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:50,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:50,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:20:50,961 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:50,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1370735312, now seen corresponding path program 3 times [2024-06-04 14:20:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508641302] [2024-06-04 14:20:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:51,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:51,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508641302] [2024-06-04 14:20:51,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508641302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:51,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:51,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821797597] [2024-06-04 14:20:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:51,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:51,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:51,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3460 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:51,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:51,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:51,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:53,360 INFO L124 PetriNetUnfolderBase]: 10176/15320 cut-off events. [2024-06-04 14:20:53,360 INFO L125 PetriNetUnfolderBase]: For 390331/390335 co-relation queries the response was YES. [2024-06-04 14:20:53,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97394 conditions, 15320 events. 10176/15320 cut-off events. For 390331/390335 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102931 event pairs, 3613 based on Foata normal form. 5/15321 useless extension candidates. Maximal degree in co-relation 97287. Up to 14411 conditions per place. [2024-06-04 14:20:53,857 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 239 selfloop transitions, 35 changer transitions 0/282 dead transitions. [2024-06-04 14:20:53,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 282 transitions, 4140 flow [2024-06-04 14:20:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:20:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:20:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-04 14:20:53,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-04 14:20:53,859 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3460 flow. Second operand 5 states and 147 transitions. [2024-06-04 14:20:53,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 282 transitions, 4140 flow [2024-06-04 14:20:55,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 282 transitions, 4066 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:55,540 INFO L231 Difference]: Finished difference. Result has 212 places, 263 transitions, 3468 flow [2024-06-04 14:20:55,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3468, PETRI_PLACES=212, PETRI_TRANSITIONS=263} [2024-06-04 14:20:55,541 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 159 predicate places. [2024-06-04 14:20:55,541 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 263 transitions, 3468 flow [2024-06-04 14:20:55,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:55,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:55,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:55,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:20:55,541 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:20:55,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1422679574, now seen corresponding path program 4 times [2024-06-04 14:20:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097849994] [2024-06-04 14:20:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097849994] [2024-06-04 14:20:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097849994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:55,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:55,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:20:55,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276429644] [2024-06-04 14:20:55,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:55,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:20:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:55,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:20:55,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:20:55,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:20:55,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 263 transitions, 3468 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:55,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:55,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:20:55,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:57,855 INFO L124 PetriNetUnfolderBase]: 10172/15317 cut-off events. [2024-06-04 14:20:57,855 INFO L125 PetriNetUnfolderBase]: For 401139/401143 co-relation queries the response was YES. [2024-06-04 14:20:57,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97561 conditions, 15317 events. 10172/15317 cut-off events. For 401139/401143 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102970 event pairs, 3611 based on Foata normal form. 5/15320 useless extension candidates. Maximal degree in co-relation 97453. Up to 14407 conditions per place. [2024-06-04 14:20:58,018 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 238 selfloop transitions, 39 changer transitions 0/285 dead transitions. [2024-06-04 14:20:58,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 285 transitions, 4106 flow [2024-06-04 14:20:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 14:20:58,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-06-04 14:20:58,020 INFO L175 Difference]: Start difference. First operand has 212 places, 263 transitions, 3468 flow. Second operand 7 states and 188 transitions. [2024-06-04 14:20:58,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 285 transitions, 4106 flow [2024-06-04 14:21:00,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 285 transitions, 3985 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:21:00,010 INFO L231 Difference]: Finished difference. Result has 215 places, 265 transitions, 3471 flow [2024-06-04 14:21:00,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3471, PETRI_PLACES=215, PETRI_TRANSITIONS=265} [2024-06-04 14:21:00,010 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-04 14:21:00,011 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 265 transitions, 3471 flow [2024-06-04 14:21:00,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:00,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:00,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:00,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:21:00,011 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:21:00,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -200821654, now seen corresponding path program 5 times [2024-06-04 14:21:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:00,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546428470] [2024-06-04 14:21:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:00,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546428470] [2024-06-04 14:21:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546428470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:00,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:00,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:21:00,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774499194] [2024-06-04 14:21:00,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:00,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:21:00,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:21:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:21:00,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:21:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 265 transitions, 3471 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:00,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:00,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:21:00,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:02,428 INFO L124 PetriNetUnfolderBase]: 10168/15307 cut-off events. [2024-06-04 14:21:02,428 INFO L125 PetriNetUnfolderBase]: For 413031/413035 co-relation queries the response was YES. [2024-06-04 14:21:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97736 conditions, 15307 events. 10168/15307 cut-off events. For 413031/413035 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 102935 event pairs, 3626 based on Foata normal form. 5/15309 useless extension candidates. Maximal degree in co-relation 97627. Up to 14384 conditions per place. [2024-06-04 14:21:02,604 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 221 selfloop transitions, 51 changer transitions 0/280 dead transitions. [2024-06-04 14:21:02,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 4073 flow [2024-06-04 14:21:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:21:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:21:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-04 14:21:02,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-04 14:21:02,605 INFO L175 Difference]: Start difference. First operand has 215 places, 265 transitions, 3471 flow. Second operand 6 states and 161 transitions. [2024-06-04 14:21:02,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 4073 flow [2024-06-04 14:21:04,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3966 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 14:21:04,685 INFO L231 Difference]: Finished difference. Result has 217 places, 267 transitions, 3499 flow [2024-06-04 14:21:04,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3499, PETRI_PLACES=217, PETRI_TRANSITIONS=267} [2024-06-04 14:21:04,685 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 164 predicate places. [2024-06-04 14:21:04,685 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 267 transitions, 3499 flow [2024-06-04 14:21:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:04,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:04,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:04,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:21:04,687 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:21:04,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1333255520, now seen corresponding path program 1 times [2024-06-04 14:21:04,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:04,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359133847] [2024-06-04 14:21:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:04,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:04,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:04,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359133847] [2024-06-04 14:21:04,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359133847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:04,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:04,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:21:04,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212738127] [2024-06-04 14:21:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:21:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:04,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:21:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:21:04,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:21:04,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 267 transitions, 3499 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:04,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:04,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:21:04,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:07,271 INFO L124 PetriNetUnfolderBase]: 10149/15277 cut-off events. [2024-06-04 14:21:07,271 INFO L125 PetriNetUnfolderBase]: For 423948/423948 co-relation queries the response was YES. [2024-06-04 14:21:07,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97565 conditions, 15277 events. 10149/15277 cut-off events. For 423948/423948 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 102571 event pairs, 3593 based on Foata normal form. 6/15280 useless extension candidates. Maximal degree in co-relation 97455. Up to 14312 conditions per place. [2024-06-04 14:21:07,428 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-04 14:21:07,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 292 transitions, 4237 flow [2024-06-04 14:21:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:21:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:21:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 14:21:07,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-04 14:21:07,429 INFO L175 Difference]: Start difference. First operand has 217 places, 267 transitions, 3499 flow. Second operand 6 states and 162 transitions. [2024-06-04 14:21:07,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 292 transitions, 4237 flow [2024-06-04 14:21:09,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 292 transitions, 4151 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 14:21:09,057 INFO L231 Difference]: Finished difference. Result has 221 places, 272 transitions, 3574 flow [2024-06-04 14:21:09,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3574, PETRI_PLACES=221, PETRI_TRANSITIONS=272} [2024-06-04 14:21:09,058 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 168 predicate places. [2024-06-04 14:21:09,058 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 272 transitions, 3574 flow [2024-06-04 14:21:09,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:09,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:09,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:21:09,059 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:21:09,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 142782008, now seen corresponding path program 1 times [2024-06-04 14:21:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:09,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174443878] [2024-06-04 14:21:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:09,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174443878] [2024-06-04 14:21:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174443878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:09,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:09,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688796893] [2024-06-04 14:21:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:09,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 14:21:09,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 272 transitions, 3574 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:09,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:09,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 14:21:09,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:12,054 INFO L124 PetriNetUnfolderBase]: 10350/15588 cut-off events. [2024-06-04 14:21:12,055 INFO L125 PetriNetUnfolderBase]: For 451979/451982 co-relation queries the response was YES. [2024-06-04 14:21:12,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100983 conditions, 15588 events. 10350/15588 cut-off events. For 451979/451982 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 104953 event pairs, 3643 based on Foata normal form. 6/15589 useless extension candidates. Maximal degree in co-relation 100870. Up to 14377 conditions per place.