./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_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/safe019_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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_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 [2024-06-03 18:47:08,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:47:08,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:47:08,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:47:08,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:47:08,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:47:08,844 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:47:08,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:47:08,845 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:47:08,845 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:47:08,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:47:08,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:47:08,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:47:08,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:47:08,847 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:47:08,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:47:08,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:47:08,848 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:47:08,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:47:08,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:47:08,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:47:08,849 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:47:08,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:47:08,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:47:08,850 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:47:08,850 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:47:08,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:47:08,851 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:47:08,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:47:08,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:47:08,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:47:08,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:47:08,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:47:08,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:47:08,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:47:08,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:47:08,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:47:08,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:47:08,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:47:08,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:47:08,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:47:08,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:47:08,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:47:08,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:47:09,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:47:09,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:47:09,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:47:09,061 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:47:09,061 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:47:09,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:47:09,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:47:10,174 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:47:10,175 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:47:10,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086555d60/494d9fa8486a493ab5746d5a619c8771/FLAG102b8b17f [2024-06-03 18:47:10,199 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/086555d60/494d9fa8486a493ab5746d5a619c8771 [2024-06-03 18:47:10,201 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:47:10,202 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:47:10,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 18:47:10,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:47:10,302 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:47:10,303 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:47:10,303 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:47:10,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:47:10,307 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:47:10" (1/2) ... [2024-06-03 18:47:10,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6429c1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:47:10, skipping insertion in model container [2024-06-03 18:47:10,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:47:10" (1/2) ... [2024-06-03 18:47:10,308 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c834d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:47:10, skipping insertion in model container [2024-06-03 18:47:10,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:47:10" (2/2) ... [2024-06-03 18:47:10,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6429c1fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10, skipping insertion in model container [2024-06-03 18:47:10,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:47:10" (2/2) ... [2024-06-03 18:47:10,309 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:47:10,351 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:47:10,352 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-03 18:47:10,352 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-03 18:47:10,352 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-03 18:47:10,352 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-03 18:47:10,352 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:47:10,353 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-03 18:47:10,405 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:47:10,682 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:47:10,690 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:47:10,773 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:47:10,810 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:47:10,810 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10 WrapperNode [2024-06-03 18:47:10,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:47:10,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:47:10,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:47:10,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:47:10,816 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 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,826 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 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,846 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-06-03 18:47:10,846 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:47:10,847 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:47:10,847 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:47:10,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:47:10,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,857 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,866 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]. [2024-06-03 18:47:10,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,871 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,872 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:47:10,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:47:10,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:47:10,877 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:47:10,877 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (1/1) ... [2024-06-03 18:47:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:47:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:47:10,899 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) [2024-06-03 18:47:10,904 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 [2024-06-03 18:47:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:47:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:47:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:47:10,926 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:47:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:47:10,926 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:47:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 18:47:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 18:47:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 18:47:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 18:47:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:47:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:47:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:47:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:47:10,928 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:47:11,027 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:47:11,029 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:47:11,259 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:47:11,259 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:47:11,351 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:47:11,351 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:47:11,352 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:47:11 BoogieIcfgContainer [2024-06-03 18:47:11,352 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:47:11,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:47:11,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:47:11,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:47:11,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:47:10" (1/4) ... [2024-06-03 18:47:11,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@856a0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:47:11, skipping insertion in model container [2024-06-03 18:47:11,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:47:10" (2/4) ... [2024-06-03 18:47:11,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@856a0f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:47:11, skipping insertion in model container [2024-06-03 18:47:11,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:47:10" (3/4) ... [2024-06-03 18:47:11,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@856a0f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:47:11, skipping insertion in model container [2024-06-03 18:47:11,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:47:11" (4/4) ... [2024-06-03 18:47:11,360 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:47:11,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:47:11,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 18:47:11,372 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:47:11,416 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:47:11,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-03 18:47:11,473 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-03 18:47:11,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:47:11,475 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. [2024-06-03 18:47:11,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-03 18:47:11,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-03 18:47:11,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:47:11,495 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;@6b2ef066, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:47:11,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 18:47:11,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:47:11,499 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 18:47:11,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:47:11,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:11,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:47:11,500 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)] === [2024-06-03 18:47:11,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1396109065, now seen corresponding path program 1 times [2024-06-03 18:47:11,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:11,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438650277] [2024-06-03 18:47:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:11,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:11,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:11,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438650277] [2024-06-03 18:47:11,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438650277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:11,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:11,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:47:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834085035] [2024-06-03 18:47:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:11,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:47:11,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:47:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:47:11,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-06-03 18:47:12,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:12,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:12,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-06-03 18:47:12,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:12,348 INFO L124 PetriNetUnfolderBase]: 1971/2943 cut-off events. [2024-06-03 18:47:12,348 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-03 18:47:12,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5875 conditions, 2943 events. 1971/2943 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16620 event pairs, 1341 based on Foata normal form. 1/2863 useless extension candidates. Maximal degree in co-relation 5859. Up to 2785 conditions per place. [2024-06-03 18:47:12,369 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-03 18:47:12,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 215 flow [2024-06-03 18:47:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:47:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:47:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-03 18:47:12,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2024-06-03 18:47:12,379 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 104 transitions. [2024-06-03 18:47:12,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 215 flow [2024-06-03 18:47:12,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:12,387 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-03 18:47:12,388 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} [2024-06-03 18:47:12,390 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-03 18:47:12,391 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-03 18:47:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:12,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:12,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:47:12,392 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)] === [2024-06-03 18:47:12,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 74239535, now seen corresponding path program 1 times [2024-06-03 18:47:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:12,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489486094] [2024-06-03 18:47:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:12,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489486094] [2024-06-03 18:47:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489486094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:12,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910664060] [2024-06-03 18:47:12,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:12,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:12,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:12,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:12,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:12,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:12,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:13,060 INFO L124 PetriNetUnfolderBase]: 3439/5046 cut-off events. [2024-06-03 18:47:13,061 INFO L125 PetriNetUnfolderBase]: For 938/956 co-relation queries the response was YES. [2024-06-03 18:47:13,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 5046 events. 3439/5046 cut-off events. For 938/956 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27566 event pairs, 1852 based on Foata normal form. 15/5030 useless extension candidates. Maximal degree in co-relation 11653. Up to 4705 conditions per place. [2024-06-03 18:47:13,085 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 49 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-03 18:47:13,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 299 flow [2024-06-03 18:47:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:47:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:47:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-03 18:47:13,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-03 18:47:13,087 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 129 transitions. [2024-06-03 18:47:13,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 299 flow [2024-06-03 18:47:13,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:47:13,089 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 162 flow [2024-06-03 18:47:13,090 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=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 18:47:13,090 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-03 18:47:13,090 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 162 flow [2024-06-03 18:47:13,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:13,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:13,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:13,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:47:13,091 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)] === [2024-06-03 18:47:13,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash -331451323, now seen corresponding path program 1 times [2024-06-03 18:47:13,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:13,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816262729] [2024-06-03 18:47:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:13,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:13,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816262729] [2024-06-03 18:47:13,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816262729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:13,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:13,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:47:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147016163] [2024-06-03 18:47:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:13,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:47:13,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:47:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:47:13,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:13,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:13,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:13,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:13,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:13,554 INFO L124 PetriNetUnfolderBase]: 3382/5002 cut-off events. [2024-06-03 18:47:13,554 INFO L125 PetriNetUnfolderBase]: For 2387/2387 co-relation queries the response was YES. [2024-06-03 18:47:13,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12699 conditions, 5002 events. 3382/5002 cut-off events. For 2387/2387 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27892 event pairs, 1738 based on Foata normal form. 3/4996 useless extension candidates. Maximal degree in co-relation 12682. Up to 4690 conditions per place. [2024-06-03 18:47:13,582 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 18:47:13,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 358 flow [2024-06-03 18:47:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:47:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:47:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-03 18:47:13,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-03 18:47:13,584 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 162 flow. Second operand 4 states and 126 transitions. [2024-06-03 18:47:13,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 358 flow [2024-06-03 18:47:13,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:13,587 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 214 flow [2024-06-03 18:47:13,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-03 18:47:13,588 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-03 18:47:13,588 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 214 flow [2024-06-03 18:47:13,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:13,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:13,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:13,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:47:13,589 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)] === [2024-06-03 18:47:13,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -697114588, now seen corresponding path program 1 times [2024-06-03 18:47:13,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:13,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297744353] [2024-06-03 18:47:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:13,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:13,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297744353] [2024-06-03 18:47:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297744353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:13,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:13,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:47:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014336453] [2024-06-03 18:47:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:47:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:47:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:47:13,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:13,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:13,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:13,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:13,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:14,088 INFO L124 PetriNetUnfolderBase]: 3367/4973 cut-off events. [2024-06-03 18:47:14,088 INFO L125 PetriNetUnfolderBase]: For 4260/4260 co-relation queries the response was YES. [2024-06-03 18:47:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14086 conditions, 4973 events. 3367/4973 cut-off events. For 4260/4260 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27735 event pairs, 1632 based on Foata normal form. 6/4970 useless extension candidates. Maximal degree in co-relation 14067. Up to 4639 conditions per place. [2024-06-03 18:47:14,118 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 61 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-03 18:47:14,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 440 flow [2024-06-03 18:47:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-03 18:47:14,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-03 18:47:14,121 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 214 flow. Second operand 5 states and 154 transitions. [2024-06-03 18:47:14,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 440 flow [2024-06-03 18:47:14,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 436 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 18:47:14,128 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 266 flow [2024-06-03 18:47:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 18:47:14,129 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-03 18:47:14,129 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 266 flow [2024-06-03 18:47:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:14,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:14,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:14,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:47:14,130 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)] === [2024-06-03 18:47:14,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:14,131 INFO L85 PathProgramCache]: Analyzing trace with hash -185775736, now seen corresponding path program 1 times [2024-06-03 18:47:14,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:14,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391580014] [2024-06-03 18:47:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:14,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391580014] [2024-06-03 18:47:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391580014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:14,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614599762] [2024-06-03 18:47:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:14,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:14,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:14,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:14,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:14,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:14,811 INFO L124 PetriNetUnfolderBase]: 4344/6383 cut-off events. [2024-06-03 18:47:14,812 INFO L125 PetriNetUnfolderBase]: For 8370/8382 co-relation queries the response was YES. [2024-06-03 18:47:14,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19313 conditions, 6383 events. 4344/6383 cut-off events. For 8370/8382 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35502 event pairs, 1756 based on Foata normal form. 15/6379 useless extension candidates. Maximal degree in co-relation 19291. Up to 5845 conditions per place. [2024-06-03 18:47:14,840 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 59 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-03 18:47:14,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 514 flow [2024-06-03 18:47:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:47:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:47:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-03 18:47:14,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-03 18:47:14,842 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 266 flow. Second operand 4 states and 129 transitions. [2024-06-03 18:47:14,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 514 flow [2024-06-03 18:47:14,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 484 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:14,847 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 336 flow [2024-06-03 18:47:14,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-03 18:47:14,848 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-03 18:47:14,848 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 336 flow [2024-06-03 18:47:14,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:14,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:14,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:14,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:47:14,849 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)] === [2024-06-03 18:47:14,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:14,849 INFO L85 PathProgramCache]: Analyzing trace with hash -174037276, now seen corresponding path program 2 times [2024-06-03 18:47:14,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:14,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601539524] [2024-06-03 18:47:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:14,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601539524] [2024-06-03 18:47:14,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601539524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:14,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:14,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:14,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573603189] [2024-06-03 18:47:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:14,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:14,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:14,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:15,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:15,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:15,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:15,395 INFO L124 PetriNetUnfolderBase]: 4335/6390 cut-off events. [2024-06-03 18:47:15,395 INFO L125 PetriNetUnfolderBase]: For 12420/12423 co-relation queries the response was YES. [2024-06-03 18:47:15,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21678 conditions, 6390 events. 4335/6390 cut-off events. For 12420/12423 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35258 event pairs, 1873 based on Foata normal form. 3/6379 useless extension candidates. Maximal degree in co-relation 21655. Up to 5887 conditions per place. [2024-06-03 18:47:15,428 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 72 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-03 18:47:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 678 flow [2024-06-03 18:47:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-03 18:47:15,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-03 18:47:15,430 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 336 flow. Second operand 5 states and 154 transitions. [2024-06-03 18:47:15,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 678 flow [2024-06-03 18:47:15,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 610 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:15,442 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 449 flow [2024-06-03 18:47:15,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-03 18:47:15,443 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-03 18:47:15,443 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 449 flow [2024-06-03 18:47:15,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:15,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:15,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:15,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:47:15,444 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:15,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1597410852, now seen corresponding path program 1 times [2024-06-03 18:47:15,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:15,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036511655] [2024-06-03 18:47:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:15,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036511655] [2024-06-03 18:47:15,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036511655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:15,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:15,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:47:15,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786468421] [2024-06-03 18:47:15,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:15,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:47:15,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:47:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:47:15,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:15,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:15,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:15,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:15,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:15,970 INFO L124 PetriNetUnfolderBase]: 4168/6209 cut-off events. [2024-06-03 18:47:15,970 INFO L125 PetriNetUnfolderBase]: For 12904/12907 co-relation queries the response was YES. [2024-06-03 18:47:15,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21339 conditions, 6209 events. 4168/6209 cut-off events. For 12904/12907 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34795 event pairs, 1823 based on Foata normal form. 5/6202 useless extension candidates. Maximal degree in co-relation 21313. Up to 5617 conditions per place. [2024-06-03 18:47:16,002 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 79 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-03 18:47:16,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 791 flow [2024-06-03 18:47:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:47:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:47:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-03 18:47:16,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-03 18:47:16,004 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 449 flow. Second operand 4 states and 127 transitions. [2024-06-03 18:47:16,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 791 flow [2024-06-03 18:47:16,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 755 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-03 18:47:16,012 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 554 flow [2024-06-03 18:47:16,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2024-06-03 18:47:16,012 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 20 predicate places. [2024-06-03 18:47:16,013 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 554 flow [2024-06-03 18:47:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:16,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:16,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:16,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:47:16,013 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)] === [2024-06-03 18:47:16,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:16,014 INFO L85 PathProgramCache]: Analyzing trace with hash -352432889, now seen corresponding path program 1 times [2024-06-03 18:47:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:16,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308357039] [2024-06-03 18:47:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:16,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308357039] [2024-06-03 18:47:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308357039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:16,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:16,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133388400] [2024-06-03 18:47:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:16,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:16,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:16,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:16,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:16,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:16,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:16,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:16,797 INFO L124 PetriNetUnfolderBase]: 4930/7282 cut-off events. [2024-06-03 18:47:16,798 INFO L125 PetriNetUnfolderBase]: For 23629/23638 co-relation queries the response was YES. [2024-06-03 18:47:16,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28386 conditions, 7282 events. 4930/7282 cut-off events. For 23629/23638 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41094 event pairs, 1236 based on Foata normal form. 34/7299 useless extension candidates. Maximal degree in co-relation 28356. Up to 5974 conditions per place. [2024-06-03 18:47:16,847 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 95 selfloop transitions, 39 changer transitions 0/142 dead transitions. [2024-06-03 18:47:16,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 142 transitions, 1079 flow [2024-06-03 18:47:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-03 18:47:16,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-03 18:47:16,849 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 554 flow. Second operand 6 states and 194 transitions. [2024-06-03 18:47:16,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 142 transitions, 1079 flow [2024-06-03 18:47:16,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 142 transitions, 1065 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-03 18:47:16,872 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 747 flow [2024-06-03 18:47:16,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=747, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2024-06-03 18:47:16,873 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-06-03 18:47:16,873 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 747 flow [2024-06-03 18:47:16,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:16,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:16,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:16,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:47:16,874 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)] === [2024-06-03 18:47:16,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 995305755, now seen corresponding path program 2 times [2024-06-03 18:47:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:16,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178719598] [2024-06-03 18:47:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178719598] [2024-06-03 18:47:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178719598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:17,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:17,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381618519] [2024-06-03 18:47:17,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:17,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:17,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:17,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 747 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:17,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:17,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:17,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:17,553 INFO L124 PetriNetUnfolderBase]: 4808/7104 cut-off events. [2024-06-03 18:47:17,553 INFO L125 PetriNetUnfolderBase]: For 30686/30695 co-relation queries the response was YES. [2024-06-03 18:47:17,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29793 conditions, 7104 events. 4808/7104 cut-off events. For 30686/30695 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 40048 event pairs, 1543 based on Foata normal form. 52/7139 useless extension candidates. Maximal degree in co-relation 29759. Up to 6153 conditions per place. [2024-06-03 18:47:17,601 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 33 changer transitions 0/130 dead transitions. [2024-06-03 18:47:17,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 1107 flow [2024-06-03 18:47:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-03 18:47:17,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644 [2024-06-03 18:47:17,602 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 747 flow. Second operand 5 states and 161 transitions. [2024-06-03 18:47:17,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 1107 flow [2024-06-03 18:47:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1042 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:17,647 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 781 flow [2024-06-03 18:47:17,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=781, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-03 18:47:17,648 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-03 18:47:17,648 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 781 flow [2024-06-03 18:47:17,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:17,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:17,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:47:17,649 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)] === [2024-06-03 18:47:17,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 253924259, now seen corresponding path program 3 times [2024-06-03 18:47:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036492036] [2024-06-03 18:47:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:17,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036492036] [2024-06-03 18:47:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036492036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156698346] [2024-06-03 18:47:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:17,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:17,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 781 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:17,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:17,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:17,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:18,364 INFO L124 PetriNetUnfolderBase]: 4885/7220 cut-off events. [2024-06-03 18:47:18,364 INFO L125 PetriNetUnfolderBase]: For 33062/33065 co-relation queries the response was YES. [2024-06-03 18:47:18,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30778 conditions, 7220 events. 4885/7220 cut-off events. For 33062/33065 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 40657 event pairs, 1791 based on Foata normal form. 24/7230 useless extension candidates. Maximal degree in co-relation 30742. Up to 6540 conditions per place. [2024-06-03 18:47:18,411 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-03 18:47:18,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 137 transitions, 1174 flow [2024-06-03 18:47:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-03 18:47:18,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-03 18:47:18,413 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 781 flow. Second operand 6 states and 183 transitions. [2024-06-03 18:47:18,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 137 transitions, 1174 flow [2024-06-03 18:47:18,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1116 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:18,450 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 811 flow [2024-06-03 18:47:18,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-03 18:47:18,451 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-06-03 18:47:18,451 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 811 flow [2024-06-03 18:47:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:18,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:18,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:47:18,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:18,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 254108709, now seen corresponding path program 1 times [2024-06-03 18:47:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195302354] [2024-06-03 18:47:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:18,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195302354] [2024-06-03 18:47:18,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195302354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:18,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:18,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:18,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125033190] [2024-06-03 18:47:18,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:18,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:18,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 811 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:18,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:18,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:19,132 INFO L124 PetriNetUnfolderBase]: 4846/7163 cut-off events. [2024-06-03 18:47:19,132 INFO L125 PetriNetUnfolderBase]: For 37299/37302 co-relation queries the response was YES. [2024-06-03 18:47:19,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31120 conditions, 7163 events. 4846/7163 cut-off events. For 37299/37302 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 40270 event pairs, 1527 based on Foata normal form. 18/7167 useless extension candidates. Maximal degree in co-relation 31083. Up to 6141 conditions per place. [2024-06-03 18:47:19,174 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-06-03 18:47:19,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 143 transitions, 1233 flow [2024-06-03 18:47:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-03 18:47:19,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-03 18:47:19,176 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 811 flow. Second operand 6 states and 185 transitions. [2024-06-03 18:47:19,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 143 transitions, 1233 flow [2024-06-03 18:47:19,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1175 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:19,214 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 865 flow [2024-06-03 18:47:19,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=865, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-03 18:47:19,215 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-06-03 18:47:19,215 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 865 flow [2024-06-03 18:47:19,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:19,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:19,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:19,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:47:19,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:19,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1350169372, now seen corresponding path program 1 times [2024-06-03 18:47:19,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:19,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328034557] [2024-06-03 18:47:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328034557] [2024-06-03 18:47:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328034557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:19,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:19,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:47:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271968129] [2024-06-03 18:47:19,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:19,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:47:19,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:47:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:47:19,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 865 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:19,873 INFO L124 PetriNetUnfolderBase]: 4585/6879 cut-off events. [2024-06-03 18:47:19,874 INFO L125 PetriNetUnfolderBase]: For 42420/42437 co-relation queries the response was YES. [2024-06-03 18:47:19,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30998 conditions, 6879 events. 4585/6879 cut-off events. For 42420/42437 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39632 event pairs, 1723 based on Foata normal form. 8/6876 useless extension candidates. Maximal degree in co-relation 30959. Up to 6285 conditions per place. [2024-06-03 18:47:19,925 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 100 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-03 18:47:19,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1269 flow [2024-06-03 18:47:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 18:47:19,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-03 18:47:19,927 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 865 flow. Second operand 5 states and 151 transitions. [2024-06-03 18:47:19,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1269 flow [2024-06-03 18:47:19,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 1206 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:19,977 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 1004 flow [2024-06-03 18:47:19,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1004, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2024-06-03 18:47:19,978 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-03 18:47:19,978 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 1004 flow [2024-06-03 18:47:19,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:19,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:19,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:19,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:47:19,979 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)] === [2024-06-03 18:47:19,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1116202485, now seen corresponding path program 1 times [2024-06-03 18:47:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:19,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780833244] [2024-06-03 18:47:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:20,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:20,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780833244] [2024-06-03 18:47:20,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780833244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:20,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:20,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:20,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432701627] [2024-06-03 18:47:20,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:20,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:20,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 1004 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) [2024-06-03 18:47:20,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:20,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:20,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:20,726 INFO L124 PetriNetUnfolderBase]: 4740/7089 cut-off events. [2024-06-03 18:47:20,726 INFO L125 PetriNetUnfolderBase]: For 46798/46807 co-relation queries the response was YES. [2024-06-03 18:47:20,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32751 conditions, 7089 events. 4740/7089 cut-off events. For 46798/46807 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 40894 event pairs, 1726 based on Foata normal form. 12/7071 useless extension candidates. Maximal degree in co-relation 32709. Up to 6320 conditions per place. [2024-06-03 18:47:20,779 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-03 18:47:20,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 141 transitions, 1421 flow [2024-06-03 18:47:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 18:47:20,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-03 18:47:20,781 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 1004 flow. Second operand 5 states and 151 transitions. [2024-06-03 18:47:20,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 141 transitions, 1421 flow [2024-06-03 18:47:20,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 141 transitions, 1375 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-03 18:47:20,847 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 1168 flow [2024-06-03 18:47:20,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1168, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-03 18:47:20,847 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 45 predicate places. [2024-06-03 18:47:20,848 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 1168 flow [2024-06-03 18:47:20,848 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) [2024-06-03 18:47:20,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:20,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:47:20,848 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)] === [2024-06-03 18:47:20,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1115816535, now seen corresponding path program 2 times [2024-06-03 18:47:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005253022] [2024-06-03 18:47:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:20,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:20,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005253022] [2024-06-03 18:47:20,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005253022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:20,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:20,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091046437] [2024-06-03 18:47:20,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:20,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:20,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:20,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 1168 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) [2024-06-03 18:47:20,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:20,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:20,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:21,568 INFO L124 PetriNetUnfolderBase]: 4767/7109 cut-off events. [2024-06-03 18:47:21,568 INFO L125 PetriNetUnfolderBase]: For 57252/57264 co-relation queries the response was YES. [2024-06-03 18:47:21,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35353 conditions, 7109 events. 4767/7109 cut-off events. For 57252/57264 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 40784 event pairs, 1749 based on Foata normal form. 14/7084 useless extension candidates. Maximal degree in co-relation 35307. Up to 6294 conditions per place. [2024-06-03 18:47:21,623 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 98 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2024-06-03 18:47:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1704 flow [2024-06-03 18:47:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-03 18:47:21,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-03 18:47:21,625 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 1168 flow. Second operand 5 states and 155 transitions. [2024-06-03 18:47:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1704 flow [2024-06-03 18:47:21,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1654 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-03 18:47:21,697 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1399 flow [2024-06-03 18:47:21,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1399, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-03 18:47:21,697 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-03 18:47:21,697 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1399 flow [2024-06-03 18:47:21,698 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) [2024-06-03 18:47:21,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:21,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:21,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:47:21,698 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)] === [2024-06-03 18:47:21,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1287758283, now seen corresponding path program 1 times [2024-06-03 18:47:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:21,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650607386] [2024-06-03 18:47:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:21,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650607386] [2024-06-03 18:47:21,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650607386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:21,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:21,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556254089] [2024-06-03 18:47:21,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:21,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:21,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:21,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1399 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:21,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:21,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:21,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:22,476 INFO L124 PetriNetUnfolderBase]: 5026/7497 cut-off events. [2024-06-03 18:47:22,477 INFO L125 PetriNetUnfolderBase]: For 65282/65294 co-relation queries the response was YES. [2024-06-03 18:47:22,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39264 conditions, 7497 events. 5026/7497 cut-off events. For 65282/65294 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42893 event pairs, 1724 based on Foata normal form. 6/7495 useless extension candidates. Maximal degree in co-relation 39215. Up to 6839 conditions per place. [2024-06-03 18:47:22,524 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 157 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-03 18:47:22,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 197 transitions, 2277 flow [2024-06-03 18:47:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-03 18:47:22,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-03 18:47:22,525 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1399 flow. Second operand 6 states and 182 transitions. [2024-06-03 18:47:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 197 transitions, 2277 flow [2024-06-03 18:47:22,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 197 transitions, 2207 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-03 18:47:22,592 INFO L231 Difference]: Finished difference. Result has 111 places, 158 transitions, 1655 flow [2024-06-03 18:47:22,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1655, PETRI_PLACES=111, PETRI_TRANSITIONS=158} [2024-06-03 18:47:22,592 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 58 predicate places. [2024-06-03 18:47:22,592 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 158 transitions, 1655 flow [2024-06-03 18:47:22,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:22,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:22,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:22,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:47:22,593 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)] === [2024-06-03 18:47:22,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1115810583, now seen corresponding path program 2 times [2024-06-03 18:47:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:22,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911501637] [2024-06-03 18:47:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:22,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:22,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:22,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911501637] [2024-06-03 18:47:22,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911501637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:22,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:22,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:22,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528383759] [2024-06-03 18:47:22,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:22,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:22,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:22,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:22,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:22,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 158 transitions, 1655 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:22,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:22,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:22,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:23,363 INFO L124 PetriNetUnfolderBase]: 5063/7555 cut-off events. [2024-06-03 18:47:23,363 INFO L125 PetriNetUnfolderBase]: For 71489/71501 co-relation queries the response was YES. [2024-06-03 18:47:23,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40428 conditions, 7555 events. 5063/7555 cut-off events. For 71489/71501 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43207 event pairs, 1720 based on Foata normal form. 11/7558 useless extension candidates. Maximal degree in co-relation 40374. Up to 6911 conditions per place. [2024-06-03 18:47:23,419 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 166 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-06-03 18:47:23,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 209 transitions, 2469 flow [2024-06-03 18:47:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-03 18:47:23,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2024-06-03 18:47:23,421 INFO L175 Difference]: Start difference. First operand has 111 places, 158 transitions, 1655 flow. Second operand 7 states and 206 transitions. [2024-06-03 18:47:23,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 209 transitions, 2469 flow [2024-06-03 18:47:23,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 209 transitions, 2375 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-03 18:47:23,527 INFO L231 Difference]: Finished difference. Result has 118 places, 170 transitions, 1810 flow [2024-06-03 18:47:23,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1810, PETRI_PLACES=118, PETRI_TRANSITIONS=170} [2024-06-03 18:47:23,528 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 65 predicate places. [2024-06-03 18:47:23,528 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 170 transitions, 1810 flow [2024-06-03 18:47:23,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:23,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:23,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:23,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:47:23,530 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)] === [2024-06-03 18:47:23,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1116017973, now seen corresponding path program 3 times [2024-06-03 18:47:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:23,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901215607] [2024-06-03 18:47:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:23,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:23,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901215607] [2024-06-03 18:47:23,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901215607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:23,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:23,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324743961] [2024-06-03 18:47:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:23,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:23,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 170 transitions, 1810 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:23,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:23,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:23,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:24,329 INFO L124 PetriNetUnfolderBase]: 5055/7545 cut-off events. [2024-06-03 18:47:24,330 INFO L125 PetriNetUnfolderBase]: For 79915/79924 co-relation queries the response was YES. [2024-06-03 18:47:24,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41365 conditions, 7545 events. 5055/7545 cut-off events. For 79915/79924 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43129 event pairs, 1725 based on Foata normal form. 5/7542 useless extension candidates. Maximal degree in co-relation 41308. Up to 6905 conditions per place. [2024-06-03 18:47:24,387 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 160 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-06-03 18:47:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 199 transitions, 2384 flow [2024-06-03 18:47:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-03 18:47:24,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-03 18:47:24,388 INFO L175 Difference]: Start difference. First operand has 118 places, 170 transitions, 1810 flow. Second operand 5 states and 154 transitions. [2024-06-03 18:47:24,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 199 transitions, 2384 flow [2024-06-03 18:47:24,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 2293 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:24,500 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1792 flow [2024-06-03 18:47:24,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1792, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-06-03 18:47:24,501 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 68 predicate places. [2024-06-03 18:47:24,501 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1792 flow [2024-06-03 18:47:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:24,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:24,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:24,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:47:24,502 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)] === [2024-06-03 18:47:24,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:24,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1115802647, now seen corresponding path program 1 times [2024-06-03 18:47:24,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:24,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802721422] [2024-06-03 18:47:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:24,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:24,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802721422] [2024-06-03 18:47:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802721422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:24,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:24,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63610521] [2024-06-03 18:47:24,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:24,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:24,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:24,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1792 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) [2024-06-03 18:47:24,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:24,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:24,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:25,371 INFO L124 PetriNetUnfolderBase]: 4877/7369 cut-off events. [2024-06-03 18:47:25,371 INFO L125 PetriNetUnfolderBase]: For 84375/84384 co-relation queries the response was YES. [2024-06-03 18:47:25,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40526 conditions, 7369 events. 4877/7369 cut-off events. For 84375/84384 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 43061 event pairs, 1706 based on Foata normal form. 18/7364 useless extension candidates. Maximal degree in co-relation 40466. Up to 6550 conditions per place. [2024-06-03 18:47:25,427 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 166 selfloop transitions, 18 changer transitions 0/200 dead transitions. [2024-06-03 18:47:25,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 200 transitions, 2356 flow [2024-06-03 18:47:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-03 18:47:25,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-03 18:47:25,429 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1792 flow. Second operand 5 states and 154 transitions. [2024-06-03 18:47:25,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 200 transitions, 2356 flow [2024-06-03 18:47:25,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 2294 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:25,564 INFO L231 Difference]: Finished difference. Result has 122 places, 173 transitions, 1825 flow [2024-06-03 18:47:25,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1825, PETRI_PLACES=122, PETRI_TRANSITIONS=173} [2024-06-03 18:47:25,565 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 69 predicate places. [2024-06-03 18:47:25,565 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 173 transitions, 1825 flow [2024-06-03 18:47:25,565 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) [2024-06-03 18:47:25,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:25,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:25,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:47:25,565 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)] === [2024-06-03 18:47:25,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1904106444, now seen corresponding path program 1 times [2024-06-03 18:47:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:25,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838445071] [2024-06-03 18:47:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838445071] [2024-06-03 18:47:25,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838445071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:25,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:25,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:47:25,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137982275] [2024-06-03 18:47:25,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:47:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:47:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:47:25,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 18:47:25,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 173 transitions, 1825 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) [2024-06-03 18:47:25,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:25,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 18:47:25,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:26,417 INFO L124 PetriNetUnfolderBase]: 4582/6927 cut-off events. [2024-06-03 18:47:26,417 INFO L125 PetriNetUnfolderBase]: For 99231/99409 co-relation queries the response was YES. [2024-06-03 18:47:26,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40017 conditions, 6927 events. 4582/6927 cut-off events. For 99231/99409 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 40969 event pairs, 1605 based on Foata normal form. 16/6792 useless extension candidates. Maximal degree in co-relation 39956. Up to 6088 conditions per place. [2024-06-03 18:47:26,482 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 140 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2024-06-03 18:47:26,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 186 transitions, 2193 flow [2024-06-03 18:47:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:47:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:47:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-03 18:47:26,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-03 18:47:26,483 INFO L175 Difference]: Start difference. First operand has 122 places, 173 transitions, 1825 flow. Second operand 4 states and 123 transitions. [2024-06-03 18:47:26,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 186 transitions, 2193 flow [2024-06-03 18:47:26,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 186 transitions, 2128 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:26,631 INFO L231 Difference]: Finished difference. Result has 124 places, 175 transitions, 1846 flow [2024-06-03 18:47:26,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1846, PETRI_PLACES=124, PETRI_TRANSITIONS=175} [2024-06-03 18:47:26,631 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 71 predicate places. [2024-06-03 18:47:26,631 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 175 transitions, 1846 flow [2024-06-03 18:47:26,632 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) [2024-06-03 18:47:26,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:26,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:26,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:47:26,632 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:26,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash 521689447, now seen corresponding path program 1 times [2024-06-03 18:47:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:26,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788856060] [2024-06-03 18:47:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:26,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:26,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788856060] [2024-06-03 18:47:26,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788856060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:26,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:26,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:26,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957537172] [2024-06-03 18:47:26,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:26,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:26,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:26,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:26,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 175 transitions, 1846 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) [2024-06-03 18:47:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:26,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:26,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:27,452 INFO L124 PetriNetUnfolderBase]: 4960/7388 cut-off events. [2024-06-03 18:47:27,452 INFO L125 PetriNetUnfolderBase]: For 101713/101737 co-relation queries the response was YES. [2024-06-03 18:47:27,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42517 conditions, 7388 events. 4960/7388 cut-off events. For 101713/101737 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 42292 event pairs, 1487 based on Foata normal form. 17/7396 useless extension candidates. Maximal degree in co-relation 42454. Up to 6430 conditions per place. [2024-06-03 18:47:27,511 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 156 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2024-06-03 18:47:27,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 215 transitions, 2534 flow [2024-06-03 18:47:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-03 18:47:27,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-03 18:47:27,512 INFO L175 Difference]: Start difference. First operand has 124 places, 175 transitions, 1846 flow. Second operand 6 states and 182 transitions. [2024-06-03 18:47:27,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 215 transitions, 2534 flow [2024-06-03 18:47:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 215 transitions, 2516 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-03 18:47:27,777 INFO L231 Difference]: Finished difference. Result has 130 places, 183 transitions, 2091 flow [2024-06-03 18:47:27,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2091, PETRI_PLACES=130, PETRI_TRANSITIONS=183} [2024-06-03 18:47:27,777 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 77 predicate places. [2024-06-03 18:47:27,777 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 183 transitions, 2091 flow [2024-06-03 18:47:27,778 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) [2024-06-03 18:47:27,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:27,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:27,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:47:27,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:27,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash 524546407, now seen corresponding path program 2 times [2024-06-03 18:47:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:27,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743228799] [2024-06-03 18:47:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:27,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:27,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743228799] [2024-06-03 18:47:27,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743228799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:27,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:27,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:47:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384484453] [2024-06-03 18:47:27,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:47:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:47:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:47:27,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:27,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 183 transitions, 2091 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) [2024-06-03 18:47:27,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:27,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:27,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:28,585 INFO L124 PetriNetUnfolderBase]: 4936/7356 cut-off events. [2024-06-03 18:47:28,585 INFO L125 PetriNetUnfolderBase]: For 113538/113552 co-relation queries the response was YES. [2024-06-03 18:47:28,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43765 conditions, 7356 events. 4936/7356 cut-off events. For 113538/113552 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 42125 event pairs, 1649 based on Foata normal form. 17/7364 useless extension candidates. Maximal degree in co-relation 43699. Up to 6556 conditions per place. [2024-06-03 18:47:28,648 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 157 selfloop transitions, 34 changer transitions 0/209 dead transitions. [2024-06-03 18:47:28,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2539 flow [2024-06-03 18:47:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-03 18:47:28,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-03 18:47:28,649 INFO L175 Difference]: Start difference. First operand has 130 places, 183 transitions, 2091 flow. Second operand 6 states and 176 transitions. [2024-06-03 18:47:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2539 flow [2024-06-03 18:47:28,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 2373 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:28,897 INFO L231 Difference]: Finished difference. Result has 133 places, 183 transitions, 2002 flow [2024-06-03 18:47:28,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2002, PETRI_PLACES=133, PETRI_TRANSITIONS=183} [2024-06-03 18:47:28,898 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 80 predicate places. [2024-06-03 18:47:28,898 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 183 transitions, 2002 flow [2024-06-03 18:47:28,898 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) [2024-06-03 18:47:28,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:28,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:28,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:47:28,899 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:28,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1028030029, now seen corresponding path program 1 times [2024-06-03 18:47:28,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:28,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521078840] [2024-06-03 18:47:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:28,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:29,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:29,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521078840] [2024-06-03 18:47:29,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521078840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:29,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:29,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:29,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805301746] [2024-06-03 18:47:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:29,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:29,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:29,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:29,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 183 transitions, 2002 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:29,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:29,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:29,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:29,740 INFO L124 PetriNetUnfolderBase]: 5109/7558 cut-off events. [2024-06-03 18:47:29,740 INFO L125 PetriNetUnfolderBase]: For 118256/118268 co-relation queries the response was YES. [2024-06-03 18:47:29,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44609 conditions, 7558 events. 5109/7558 cut-off events. For 118256/118268 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42919 event pairs, 1670 based on Foata normal form. 8/7553 useless extension candidates. Maximal degree in co-relation 44542. Up to 6895 conditions per place. [2024-06-03 18:47:29,901 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 154 selfloop transitions, 48 changer transitions 0/210 dead transitions. [2024-06-03 18:47:29,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 210 transitions, 2544 flow [2024-06-03 18:47:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-03 18:47:29,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2024-06-03 18:47:29,902 INFO L175 Difference]: Start difference. First operand has 133 places, 183 transitions, 2002 flow. Second operand 5 states and 153 transitions. [2024-06-03 18:47:29,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 210 transitions, 2544 flow [2024-06-03 18:47:30,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2471 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:30,056 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 2122 flow [2024-06-03 18:47:30,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2122, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2024-06-03 18:47:30,056 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 81 predicate places. [2024-06-03 18:47:30,056 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 2122 flow [2024-06-03 18:47:30,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:30,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:30,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:47:30,057 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:30,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:30,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1602512663, now seen corresponding path program 2 times [2024-06-03 18:47:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:30,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465980601] [2024-06-03 18:47:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465980601] [2024-06-03 18:47:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465980601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:30,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:30,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:30,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393010141] [2024-06-03 18:47:30,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:30,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:30,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:30,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 2122 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:30,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:30,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:30,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:30,916 INFO L124 PetriNetUnfolderBase]: 5125/7640 cut-off events. [2024-06-03 18:47:30,916 INFO L125 PetriNetUnfolderBase]: For 132960/132972 co-relation queries the response was YES. [2024-06-03 18:47:30,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46471 conditions, 7640 events. 5125/7640 cut-off events. For 132960/132972 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 43966 event pairs, 1670 based on Foata normal form. 8/7635 useless extension candidates. Maximal degree in co-relation 46403. Up to 6876 conditions per place. [2024-06-03 18:47:30,980 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 162 selfloop transitions, 57 changer transitions 0/227 dead transitions. [2024-06-03 18:47:30,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 227 transitions, 2886 flow [2024-06-03 18:47:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 18:47:30,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-03 18:47:30,981 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 2122 flow. Second operand 6 states and 181 transitions. [2024-06-03 18:47:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 227 transitions, 2886 flow [2024-06-03 18:47:31,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 227 transitions, 2753 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:31,195 INFO L231 Difference]: Finished difference. Result has 137 places, 195 transitions, 2280 flow [2024-06-03 18:47:31,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2280, PETRI_PLACES=137, PETRI_TRANSITIONS=195} [2024-06-03 18:47:31,195 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-03 18:47:31,196 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 195 transitions, 2280 flow [2024-06-03 18:47:31,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:31,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:31,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:47:31,196 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:31,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1602243893, now seen corresponding path program 3 times [2024-06-03 18:47:31,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:31,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403320351] [2024-06-03 18:47:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:31,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:31,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403320351] [2024-06-03 18:47:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403320351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:31,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:31,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:31,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942692635] [2024-06-03 18:47:31,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:31,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:31,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:31,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 195 transitions, 2280 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:31,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:31,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:31,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:32,163 INFO L124 PetriNetUnfolderBase]: 5141/7666 cut-off events. [2024-06-03 18:47:32,163 INFO L125 PetriNetUnfolderBase]: For 148680/148692 co-relation queries the response was YES. [2024-06-03 18:47:32,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48224 conditions, 7666 events. 5141/7666 cut-off events. For 148680/148692 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 44140 event pairs, 1670 based on Foata normal form. 8/7661 useless extension candidates. Maximal degree in co-relation 48155. Up to 6893 conditions per place. [2024-06-03 18:47:32,218 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 158 selfloop transitions, 62 changer transitions 0/228 dead transitions. [2024-06-03 18:47:32,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 228 transitions, 2970 flow [2024-06-03 18:47:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-03 18:47:32,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-06-03 18:47:32,219 INFO L175 Difference]: Start difference. First operand has 137 places, 195 transitions, 2280 flow. Second operand 6 states and 179 transitions. [2024-06-03 18:47:32,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 228 transitions, 2970 flow [2024-06-03 18:47:32,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 228 transitions, 2807 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:32,463 INFO L231 Difference]: Finished difference. Result has 141 places, 199 transitions, 2338 flow [2024-06-03 18:47:32,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2338, PETRI_PLACES=141, PETRI_TRANSITIONS=199} [2024-06-03 18:47:32,463 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-06-03 18:47:32,463 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 199 transitions, 2338 flow [2024-06-03 18:47:32,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:32,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:32,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:32,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:47:32,464 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)] === [2024-06-03 18:47:32,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -912469748, now seen corresponding path program 1 times [2024-06-03 18:47:32,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:32,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810757315] [2024-06-03 18:47:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:32,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:32,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:32,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810757315] [2024-06-03 18:47:32,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810757315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:32,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779889383] [2024-06-03 18:47:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:32,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:32,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 199 transitions, 2338 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:32,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:32,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:32,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:33,394 INFO L124 PetriNetUnfolderBase]: 5245/7843 cut-off events. [2024-06-03 18:47:33,394 INFO L125 PetriNetUnfolderBase]: For 156910/156928 co-relation queries the response was YES. [2024-06-03 18:47:33,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49799 conditions, 7843 events. 5245/7843 cut-off events. For 156910/156928 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 45235 event pairs, 1658 based on Foata normal form. 15/7849 useless extension candidates. Maximal degree in co-relation 49728. Up to 6951 conditions per place. [2024-06-03 18:47:33,468 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 174 selfloop transitions, 84 changer transitions 0/266 dead transitions. [2024-06-03 18:47:33,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 266 transitions, 3525 flow [2024-06-03 18:47:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:47:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:47:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-06-03 18:47:33,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2024-06-03 18:47:33,471 INFO L175 Difference]: Start difference. First operand has 141 places, 199 transitions, 2338 flow. Second operand 9 states and 259 transitions. [2024-06-03 18:47:33,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 266 transitions, 3525 flow [2024-06-03 18:47:33,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 266 transitions, 3386 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:33,860 INFO L231 Difference]: Finished difference. Result has 150 places, 223 transitions, 2766 flow [2024-06-03 18:47:33,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2766, PETRI_PLACES=150, PETRI_TRANSITIONS=223} [2024-06-03 18:47:33,860 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-03 18:47:33,860 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 223 transitions, 2766 flow [2024-06-03 18:47:33,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:33,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:33,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:47:33,861 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)] === [2024-06-03 18:47:33,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash -934067158, now seen corresponding path program 2 times [2024-06-03 18:47:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987566202] [2024-06-03 18:47:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:33,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:33,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987566202] [2024-06-03 18:47:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987566202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:33,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:33,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647015983] [2024-06-03 18:47:33,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:33,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:34,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:34,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 223 transitions, 2766 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:34,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:34,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:34,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:34,976 INFO L124 PetriNetUnfolderBase]: 5447/8140 cut-off events. [2024-06-03 18:47:34,976 INFO L125 PetriNetUnfolderBase]: For 183386/183398 co-relation queries the response was YES. [2024-06-03 18:47:35,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55055 conditions, 8140 events. 5447/8140 cut-off events. For 183386/183398 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 47042 event pairs, 1670 based on Foata normal form. 12/8139 useless extension candidates. Maximal degree in co-relation 54980. Up to 7136 conditions per place. [2024-06-03 18:47:35,058 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 181 selfloop transitions, 92 changer transitions 0/281 dead transitions. [2024-06-03 18:47:35,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 281 transitions, 4040 flow [2024-06-03 18:47:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-03 18:47:35,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-03 18:47:35,060 INFO L175 Difference]: Start difference. First operand has 150 places, 223 transitions, 2766 flow. Second operand 6 states and 188 transitions. [2024-06-03 18:47:35,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 281 transitions, 4040 flow [2024-06-03 18:47:35,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 281 transitions, 3856 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:35,418 INFO L231 Difference]: Finished difference. Result has 154 places, 249 transitions, 3309 flow [2024-06-03 18:47:35,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3309, PETRI_PLACES=154, PETRI_TRANSITIONS=249} [2024-06-03 18:47:35,419 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 101 predicate places. [2024-06-03 18:47:35,419 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 249 transitions, 3309 flow [2024-06-03 18:47:35,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:35,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:35,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:35,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:47:35,419 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)] === [2024-06-03 18:47:35,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash -934067499, now seen corresponding path program 4 times [2024-06-03 18:47:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46895343] [2024-06-03 18:47:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46895343] [2024-06-03 18:47:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46895343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:35,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609645085] [2024-06-03 18:47:35,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:35,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:35,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 249 transitions, 3309 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:35,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:35,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:35,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:36,567 INFO L124 PetriNetUnfolderBase]: 5440/8108 cut-off events. [2024-06-03 18:47:36,568 INFO L125 PetriNetUnfolderBase]: For 206803/206815 co-relation queries the response was YES. [2024-06-03 18:47:36,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57832 conditions, 8108 events. 5440/8108 cut-off events. For 206803/206815 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46981 event pairs, 1663 based on Foata normal form. 8/8103 useless extension candidates. Maximal degree in co-relation 57754. Up to 7309 conditions per place. [2024-06-03 18:47:36,654 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 213 selfloop transitions, 52 changer transitions 0/273 dead transitions. [2024-06-03 18:47:36,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 273 transitions, 3901 flow [2024-06-03 18:47:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-03 18:47:36,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-03 18:47:36,655 INFO L175 Difference]: Start difference. First operand has 154 places, 249 transitions, 3309 flow. Second operand 5 states and 155 transitions. [2024-06-03 18:47:36,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 273 transitions, 3901 flow [2024-06-03 18:47:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 273 transitions, 3695 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:37,249 INFO L231 Difference]: Finished difference. Result has 156 places, 249 transitions, 3223 flow [2024-06-03 18:47:37,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3223, PETRI_PLACES=156, PETRI_TRANSITIONS=249} [2024-06-03 18:47:37,249 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 103 predicate places. [2024-06-03 18:47:37,249 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 249 transitions, 3223 flow [2024-06-03 18:47:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:37,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:37,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:47:37,250 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)] === [2024-06-03 18:47:37,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash -933859768, now seen corresponding path program 3 times [2024-06-03 18:47:37,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:37,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54181604] [2024-06-03 18:47:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:37,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:37,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:37,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54181604] [2024-06-03 18:47:37,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54181604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:37,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:37,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:37,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014380608] [2024-06-03 18:47:37,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:37,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:37,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 249 transitions, 3223 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:37,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:37,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:37,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:38,332 INFO L124 PetriNetUnfolderBase]: 5446/8145 cut-off events. [2024-06-03 18:47:38,333 INFO L125 PetriNetUnfolderBase]: For 201131/201143 co-relation queries the response was YES. [2024-06-03 18:47:38,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57443 conditions, 8145 events. 5446/8145 cut-off events. For 201131/201143 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 47169 event pairs, 1670 based on Foata normal form. 12/8144 useless extension candidates. Maximal degree in co-relation 57364. Up to 7139 conditions per place. [2024-06-03 18:47:38,409 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 180 selfloop transitions, 106 changer transitions 0/294 dead transitions. [2024-06-03 18:47:38,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 294 transitions, 4186 flow [2024-06-03 18:47:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-03 18:47:38,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-03 18:47:38,411 INFO L175 Difference]: Start difference. First operand has 156 places, 249 transitions, 3223 flow. Second operand 8 states and 237 transitions. [2024-06-03 18:47:38,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 294 transitions, 4186 flow [2024-06-03 18:47:38,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 294 transitions, 4023 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:38,866 INFO L231 Difference]: Finished difference. Result has 159 places, 258 transitions, 3451 flow [2024-06-03 18:47:38,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3451, PETRI_PLACES=159, PETRI_TRANSITIONS=258} [2024-06-03 18:47:38,868 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-03 18:47:38,868 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 258 transitions, 3451 flow [2024-06-03 18:47:38,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:38,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:38,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:47:38,869 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)] === [2024-06-03 18:47:38,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash -933851832, now seen corresponding path program 1 times [2024-06-03 18:47:38,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485286491] [2024-06-03 18:47:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:38,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485286491] [2024-06-03 18:47:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485286491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:38,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:38,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:38,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855187981] [2024-06-03 18:47:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:38,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:39,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:39,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 258 transitions, 3451 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) [2024-06-03 18:47:39,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:39,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:39,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:39,932 INFO L124 PetriNetUnfolderBase]: 5608/8418 cut-off events. [2024-06-03 18:47:39,932 INFO L125 PetriNetUnfolderBase]: For 220666/220709 co-relation queries the response was YES. [2024-06-03 18:47:39,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59099 conditions, 8418 events. 5608/8418 cut-off events. For 220666/220709 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 49687 event pairs, 1697 based on Foata normal form. 60/8440 useless extension candidates. Maximal degree in co-relation 59019. Up to 6950 conditions per place. [2024-06-03 18:47:40,017 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 211 selfloop transitions, 49 changer transitions 0/287 dead transitions. [2024-06-03 18:47:40,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 287 transitions, 4189 flow [2024-06-03 18:47:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 18:47:40,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-03 18:47:40,022 INFO L175 Difference]: Start difference. First operand has 159 places, 258 transitions, 3451 flow. Second operand 6 states and 181 transitions. [2024-06-03 18:47:40,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 287 transitions, 4189 flow [2024-06-03 18:47:40,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 287 transitions, 3899 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 18:47:40,452 INFO L231 Difference]: Finished difference. Result has 158 places, 260 transitions, 3333 flow [2024-06-03 18:47:40,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3333, PETRI_PLACES=158, PETRI_TRANSITIONS=260} [2024-06-03 18:47:40,453 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-03 18:47:40,453 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 260 transitions, 3333 flow [2024-06-03 18:47:40,453 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) [2024-06-03 18:47:40,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:40,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:40,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:47:40,454 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:40,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:40,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2086012619, now seen corresponding path program 1 times [2024-06-03 18:47:40,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:40,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525613112] [2024-06-03 18:47:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525613112] [2024-06-03 18:47:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525613112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:40,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:40,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:47:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768289060] [2024-06-03 18:47:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:40,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:47:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:47:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:47:40,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 18:47:40,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 260 transitions, 3333 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) [2024-06-03 18:47:40,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:40,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 18:47:40,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:41,452 INFO L124 PetriNetUnfolderBase]: 5245/7884 cut-off events. [2024-06-03 18:47:41,453 INFO L125 PetriNetUnfolderBase]: For 221096/221344 co-relation queries the response was YES. [2024-06-03 18:47:41,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57114 conditions, 7884 events. 5245/7884 cut-off events. For 221096/221344 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47112 event pairs, 1580 based on Foata normal form. 9/7723 useless extension candidates. Maximal degree in co-relation 57034. Up to 6747 conditions per place. [2024-06-03 18:47:41,534 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 186 selfloop transitions, 44 changer transitions 0/275 dead transitions. [2024-06-03 18:47:41,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 275 transitions, 3831 flow [2024-06-03 18:47:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 18:47:41,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-03 18:47:41,536 INFO L175 Difference]: Start difference. First operand has 158 places, 260 transitions, 3333 flow. Second operand 5 states and 151 transitions. [2024-06-03 18:47:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 275 transitions, 3831 flow [2024-06-03 18:47:41,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 275 transitions, 3703 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:41,941 INFO L231 Difference]: Finished difference. Result has 159 places, 260 transitions, 3316 flow [2024-06-03 18:47:41,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3316, PETRI_PLACES=159, PETRI_TRANSITIONS=260} [2024-06-03 18:47:41,942 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-03 18:47:41,942 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 260 transitions, 3316 flow [2024-06-03 18:47:41,942 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) [2024-06-03 18:47:41,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:41,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:41,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:47:41,943 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)] === [2024-06-03 18:47:41,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:41,943 INFO L85 PathProgramCache]: Analyzing trace with hash -919163558, now seen corresponding path program 4 times [2024-06-03 18:47:41,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:41,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441307918] [2024-06-03 18:47:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441307918] [2024-06-03 18:47:42,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441307918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:42,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:42,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158059498] [2024-06-03 18:47:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:42,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:42,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 260 transitions, 3316 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:42,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:42,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:42,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:42,975 INFO L124 PetriNetUnfolderBase]: 5766/8594 cut-off events. [2024-06-03 18:47:42,975 INFO L125 PetriNetUnfolderBase]: For 213774/213792 co-relation queries the response was YES. [2024-06-03 18:47:43,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60487 conditions, 8594 events. 5766/8594 cut-off events. For 213774/213792 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 49944 event pairs, 1721 based on Foata normal form. 11/8591 useless extension candidates. Maximal degree in co-relation 60406. Up to 7488 conditions per place. [2024-06-03 18:47:43,063 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 211 selfloop transitions, 114 changer transitions 0/333 dead transitions. [2024-06-03 18:47:43,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 333 transitions, 4892 flow [2024-06-03 18:47:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-03 18:47:43,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-03 18:47:43,064 INFO L175 Difference]: Start difference. First operand has 159 places, 260 transitions, 3316 flow. Second operand 7 states and 212 transitions. [2024-06-03 18:47:43,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 333 transitions, 4892 flow [2024-06-03 18:47:43,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 333 transitions, 4782 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:43,507 INFO L231 Difference]: Finished difference. Result has 164 places, 289 transitions, 4006 flow [2024-06-03 18:47:43,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4006, PETRI_PLACES=164, PETRI_TRANSITIONS=289} [2024-06-03 18:47:43,508 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 111 predicate places. [2024-06-03 18:47:43,508 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 289 transitions, 4006 flow [2024-06-03 18:47:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:43,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:43,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:47:43,509 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)] === [2024-06-03 18:47:43,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1704401538, now seen corresponding path program 5 times [2024-06-03 18:47:43,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:43,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404235431] [2024-06-03 18:47:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:43,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:43,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404235431] [2024-06-03 18:47:43,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404235431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:43,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:43,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266729162] [2024-06-03 18:47:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:43,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:43,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 289 transitions, 4006 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:43,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:43,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:43,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:44,649 INFO L124 PetriNetUnfolderBase]: 5769/8579 cut-off events. [2024-06-03 18:47:44,650 INFO L125 PetriNetUnfolderBase]: For 232940/232952 co-relation queries the response was YES. [2024-06-03 18:47:44,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63473 conditions, 8579 events. 5769/8579 cut-off events. For 232940/232952 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 49880 event pairs, 1712 based on Foata normal form. 9/8575 useless extension candidates. Maximal degree in co-relation 63389. Up to 7778 conditions per place. [2024-06-03 18:47:44,736 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 261 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-03 18:47:44,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 327 transitions, 4934 flow [2024-06-03 18:47:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-03 18:47:44,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-06-03 18:47:44,737 INFO L175 Difference]: Start difference. First operand has 164 places, 289 transitions, 4006 flow. Second operand 7 states and 204 transitions. [2024-06-03 18:47:44,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 327 transitions, 4934 flow [2024-06-03 18:47:45,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 327 transitions, 4784 flow, removed 75 selfloop flow, removed 0 redundant places. [2024-06-03 18:47:45,277 INFO L231 Difference]: Finished difference. Result has 172 places, 297 transitions, 4160 flow [2024-06-03 18:47:45,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4160, PETRI_PLACES=172, PETRI_TRANSITIONS=297} [2024-06-03 18:47:45,277 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 119 predicate places. [2024-06-03 18:47:45,278 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 297 transitions, 4160 flow [2024-06-03 18:47:45,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:45,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:45,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:45,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:47:45,278 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)] === [2024-06-03 18:47:45,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:45,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1447900552, now seen corresponding path program 6 times [2024-06-03 18:47:45,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:45,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394522886] [2024-06-03 18:47:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:45,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:45,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:45,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394522886] [2024-06-03 18:47:45,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394522886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:45,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:45,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238684530] [2024-06-03 18:47:45,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:45,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:45,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:45,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:45,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 297 transitions, 4160 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:45,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:45,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:45,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:46,419 INFO L124 PetriNetUnfolderBase]: 5915/8796 cut-off events. [2024-06-03 18:47:46,419 INFO L125 PetriNetUnfolderBase]: For 250058/250070 co-relation queries the response was YES. [2024-06-03 18:47:46,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66065 conditions, 8796 events. 5915/8796 cut-off events. For 250058/250070 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 51114 event pairs, 1727 based on Foata normal form. 9/8783 useless extension candidates. Maximal degree in co-relation 65977. Up to 7553 conditions per place. [2024-06-03 18:47:46,515 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 192 selfloop transitions, 169 changer transitions 0/369 dead transitions. [2024-06-03 18:47:46,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 369 transitions, 5949 flow [2024-06-03 18:47:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-03 18:47:46,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-03 18:47:46,516 INFO L175 Difference]: Start difference. First operand has 172 places, 297 transitions, 4160 flow. Second operand 8 states and 244 transitions. [2024-06-03 18:47:46,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 369 transitions, 5949 flow [2024-06-03 18:47:47,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 369 transitions, 5721 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:47,099 INFO L231 Difference]: Finished difference. Result has 178 places, 326 transitions, 4924 flow [2024-06-03 18:47:47,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4924, PETRI_PLACES=178, PETRI_TRANSITIONS=326} [2024-06-03 18:47:47,100 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 125 predicate places. [2024-06-03 18:47:47,100 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 326 transitions, 4924 flow [2024-06-03 18:47:47,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:47,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:47,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:47:47,100 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)] === [2024-06-03 18:47:47,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1709942478, now seen corresponding path program 7 times [2024-06-03 18:47:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:47,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272614922] [2024-06-03 18:47:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:47,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272614922] [2024-06-03 18:47:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272614922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:47,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:47,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:47,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446760076] [2024-06-03 18:47:47,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:47,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:47,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:47,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 326 transitions, 4924 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:47,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:47,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:47,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:48,429 INFO L124 PetriNetUnfolderBase]: 5926/8819 cut-off events. [2024-06-03 18:47:48,429 INFO L125 PetriNetUnfolderBase]: For 276975/276987 co-relation queries the response was YES. [2024-06-03 18:47:48,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69175 conditions, 8819 events. 5926/8819 cut-off events. For 276975/276987 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 51257 event pairs, 1727 based on Foata normal form. 12/8809 useless extension candidates. Maximal degree in co-relation 69085. Up to 7569 conditions per place. [2024-06-03 18:47:48,523 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 194 selfloop transitions, 183 changer transitions 0/385 dead transitions. [2024-06-03 18:47:48,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 385 transitions, 6380 flow [2024-06-03 18:47:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:47:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:47:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-03 18:47:48,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955555555555555 [2024-06-03 18:47:48,524 INFO L175 Difference]: Start difference. First operand has 178 places, 326 transitions, 4924 flow. Second operand 9 states and 268 transitions. [2024-06-03 18:47:48,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 385 transitions, 6380 flow [2024-06-03 18:47:49,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 385 transitions, 6124 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:49,084 INFO L231 Difference]: Finished difference. Result has 185 places, 338 transitions, 5253 flow [2024-06-03 18:47:49,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5253, PETRI_PLACES=185, PETRI_TRANSITIONS=338} [2024-06-03 18:47:49,085 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-03 18:47:49,085 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 338 transitions, 5253 flow [2024-06-03 18:47:49,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:49,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:49,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:49,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:47:49,085 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)] === [2024-06-03 18:47:49,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:49,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1248598762, now seen corresponding path program 8 times [2024-06-03 18:47:49,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:49,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863866169] [2024-06-03 18:47:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:49,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:49,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:49,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863866169] [2024-06-03 18:47:49,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863866169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:49,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:49,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387317769] [2024-06-03 18:47:49,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:49,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:49,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:49,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 338 transitions, 5253 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:49,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:49,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:49,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:50,257 INFO L124 PetriNetUnfolderBase]: 5918/8821 cut-off events. [2024-06-03 18:47:50,257 INFO L125 PetriNetUnfolderBase]: For 272814/272826 co-relation queries the response was YES. [2024-06-03 18:47:50,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68379 conditions, 8821 events. 5918/8821 cut-off events. For 272814/272826 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 51401 event pairs, 1771 based on Foata normal form. 5/8806 useless extension candidates. Maximal degree in co-relation 68287. Up to 7563 conditions per place. [2024-06-03 18:47:50,353 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 191 selfloop transitions, 168 changer transitions 0/367 dead transitions. [2024-06-03 18:47:50,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 367 transitions, 6235 flow [2024-06-03 18:47:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-03 18:47:50,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-03 18:47:50,354 INFO L175 Difference]: Start difference. First operand has 185 places, 338 transitions, 5253 flow. Second operand 6 states and 186 transitions. [2024-06-03 18:47:50,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 367 transitions, 6235 flow [2024-06-03 18:47:50,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 367 transitions, 5778 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:50,992 INFO L231 Difference]: Finished difference. Result has 186 places, 338 transitions, 5142 flow [2024-06-03 18:47:50,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5142, PETRI_PLACES=186, PETRI_TRANSITIONS=338} [2024-06-03 18:47:50,992 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 133 predicate places. [2024-06-03 18:47:50,992 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 338 transitions, 5142 flow [2024-06-03 18:47:50,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:50,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:50,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:50,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:47:50,993 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)] === [2024-06-03 18:47:50,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1442194568, now seen corresponding path program 2 times [2024-06-03 18:47:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:50,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124562521] [2024-06-03 18:47:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:51,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:51,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124562521] [2024-06-03 18:47:51,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124562521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:51,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:51,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:51,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799831556] [2024-06-03 18:47:51,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:51,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:51,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:51,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:51,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:51,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:51,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 338 transitions, 5142 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) [2024-06-03 18:47:51,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:51,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:51,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:52,220 INFO L124 PetriNetUnfolderBase]: 6034/9022 cut-off events. [2024-06-03 18:47:52,221 INFO L125 PetriNetUnfolderBase]: For 309765/309774 co-relation queries the response was YES. [2024-06-03 18:47:52,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69381 conditions, 9022 events. 6034/9022 cut-off events. For 309765/309774 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 53404 event pairs, 1778 based on Foata normal form. 60/9043 useless extension candidates. Maximal degree in co-relation 69288. Up to 7544 conditions per place. [2024-06-03 18:47:52,461 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 271 selfloop transitions, 62 changer transitions 0/371 dead transitions. [2024-06-03 18:47:52,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 371 transitions, 6120 flow [2024-06-03 18:47:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-03 18:47:52,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-03 18:47:52,462 INFO L175 Difference]: Start difference. First operand has 186 places, 338 transitions, 5142 flow. Second operand 6 states and 184 transitions. [2024-06-03 18:47:52,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 371 transitions, 6120 flow [2024-06-03 18:47:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 371 transitions, 5774 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:53,048 INFO L231 Difference]: Finished difference. Result has 187 places, 340 transitions, 4995 flow [2024-06-03 18:47:53,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4995, PETRI_PLACES=187, PETRI_TRANSITIONS=340} [2024-06-03 18:47:53,049 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 134 predicate places. [2024-06-03 18:47:53,049 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 340 transitions, 4995 flow [2024-06-03 18:47:53,049 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) [2024-06-03 18:47:53,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:53,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:53,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:47:53,049 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:53,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1455527048, now seen corresponding path program 3 times [2024-06-03 18:47:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:53,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457850094] [2024-06-03 18:47:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:53,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:53,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457850094] [2024-06-03 18:47:53,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457850094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:53,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:53,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:53,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348826241] [2024-06-03 18:47:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:53,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:53,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-03 18:47:53,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 340 transitions, 4995 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) [2024-06-03 18:47:53,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:53,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-03 18:47:53,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:54,346 INFO L124 PetriNetUnfolderBase]: 6436/9618 cut-off events. [2024-06-03 18:47:54,346 INFO L125 PetriNetUnfolderBase]: For 341037/341046 co-relation queries the response was YES. [2024-06-03 18:47:54,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74030 conditions, 9618 events. 6436/9618 cut-off events. For 341037/341046 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 57496 event pairs, 1798 based on Foata normal form. 54/9633 useless extension candidates. Maximal degree in co-relation 73936. Up to 7304 conditions per place. [2024-06-03 18:47:54,454 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 274 selfloop transitions, 69 changer transitions 0/381 dead transitions. [2024-06-03 18:47:54,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 381 transitions, 6129 flow [2024-06-03 18:47:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-03 18:47:54,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-03 18:47:54,455 INFO L175 Difference]: Start difference. First operand has 187 places, 340 transitions, 4995 flow. Second operand 6 states and 189 transitions. [2024-06-03 18:47:54,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 381 transitions, 6129 flow [2024-06-03 18:47:55,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 381 transitions, 5978 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:55,302 INFO L231 Difference]: Finished difference. Result has 189 places, 343 transitions, 5073 flow [2024-06-03 18:47:55,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5073, PETRI_PLACES=189, PETRI_TRANSITIONS=343} [2024-06-03 18:47:55,302 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-03 18:47:55,302 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 343 transitions, 5073 flow [2024-06-03 18:47:55,303 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) [2024-06-03 18:47:55,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:55,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:55,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:47:55,303 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)] === [2024-06-03 18:47:55,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash -838869781, now seen corresponding path program 2 times [2024-06-03 18:47:55,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:55,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101791771] [2024-06-03 18:47:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:55,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:55,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101791771] [2024-06-03 18:47:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101791771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:55,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:55,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:47:55,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580869353] [2024-06-03 18:47:55,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:55,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:47:55,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:47:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:47:55,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 18:47:55,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 343 transitions, 5073 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) [2024-06-03 18:47:55,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:55,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 18:47:55,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:56,529 INFO L124 PetriNetUnfolderBase]: 6187/9213 cut-off events. [2024-06-03 18:47:56,529 INFO L125 PetriNetUnfolderBase]: For 361463/361713 co-relation queries the response was YES. [2024-06-03 18:47:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73552 conditions, 9213 events. 6187/9213 cut-off events. For 361463/361713 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 55494 event pairs, 1803 based on Foata normal form. 9/9032 useless extension candidates. Maximal degree in co-relation 73457. Up to 7936 conditions per place. [2024-06-03 18:47:56,641 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 236 selfloop transitions, 70 changer transitions 0/364 dead transitions. [2024-06-03 18:47:56,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 364 transitions, 5957 flow [2024-06-03 18:47:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:47:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:47:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-03 18:47:56,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-03 18:47:56,642 INFO L175 Difference]: Start difference. First operand has 189 places, 343 transitions, 5073 flow. Second operand 5 states and 151 transitions. [2024-06-03 18:47:56,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 364 transitions, 5957 flow [2024-06-03 18:47:57,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 364 transitions, 5844 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:57,547 INFO L231 Difference]: Finished difference. Result has 192 places, 350 transitions, 5225 flow [2024-06-03 18:47:57,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5225, PETRI_PLACES=192, PETRI_TRANSITIONS=350} [2024-06-03 18:47:57,548 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 139 predicate places. [2024-06-03 18:47:57,548 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 350 transitions, 5225 flow [2024-06-03 18:47:57,548 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) [2024-06-03 18:47:57,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:57,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:57,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:47:57,548 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:47:57,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 440167598, now seen corresponding path program 1 times [2024-06-03 18:47:57,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:57,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825348327] [2024-06-03 18:47:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:57,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:57,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825348327] [2024-06-03 18:47:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825348327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:57,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:57,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:57,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828061657] [2024-06-03 18:47:57,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:57,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:57,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:47:57,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 350 transitions, 5225 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:57,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:57,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:47:57,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:59,064 INFO L124 PetriNetUnfolderBase]: 7497/11097 cut-off events. [2024-06-03 18:47:59,064 INFO L125 PetriNetUnfolderBase]: For 408352/408361 co-relation queries the response was YES. [2024-06-03 18:47:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85526 conditions, 11097 events. 7497/11097 cut-off events. For 408352/408361 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 66535 event pairs, 2080 based on Foata normal form. 38/11127 useless extension candidates. Maximal degree in co-relation 85429. Up to 9091 conditions per place. [2024-06-03 18:47:59,194 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 372 selfloop transitions, 45 changer transitions 0/425 dead transitions. [2024-06-03 18:47:59,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 425 transitions, 6924 flow [2024-06-03 18:47:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-03 18:47:59,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-03 18:47:59,195 INFO L175 Difference]: Start difference. First operand has 192 places, 350 transitions, 5225 flow. Second operand 7 states and 221 transitions. [2024-06-03 18:47:59,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 425 transitions, 6924 flow [2024-06-03 18:48:00,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 425 transitions, 6711 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 18:48:00,121 INFO L231 Difference]: Finished difference. Result has 197 places, 358 transitions, 5297 flow [2024-06-03 18:48:00,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5297, PETRI_PLACES=197, PETRI_TRANSITIONS=358} [2024-06-03 18:48:00,122 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 144 predicate places. [2024-06-03 18:48:00,122 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 358 transitions, 5297 flow [2024-06-03 18:48:00,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:00,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:00,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:00,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:48:00,122 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:00,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash 528733358, now seen corresponding path program 2 times [2024-06-03 18:48:00,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:00,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903806095] [2024-06-03 18:48:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:00,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903806095] [2024-06-03 18:48:00,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903806095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:00,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:00,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:00,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144869866] [2024-06-03 18:48:00,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:00,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:00,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:00,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:00,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 358 transitions, 5297 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:00,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:00,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:00,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:02,018 INFO L124 PetriNetUnfolderBase]: 8147/12059 cut-off events. [2024-06-03 18:48:02,018 INFO L125 PetriNetUnfolderBase]: For 476692/476701 co-relation queries the response was YES. [2024-06-03 18:48:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94959 conditions, 12059 events. 8147/12059 cut-off events. For 476692/476701 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 73282 event pairs, 2356 based on Foata normal form. 38/12089 useless extension candidates. Maximal degree in co-relation 94861. Up to 10435 conditions per place. [2024-06-03 18:48:02,160 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 363 selfloop transitions, 44 changer transitions 0/415 dead transitions. [2024-06-03 18:48:02,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 415 transitions, 6809 flow [2024-06-03 18:48:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:48:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:48:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-03 18:48:02,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2024-06-03 18:48:02,166 INFO L175 Difference]: Start difference. First operand has 197 places, 358 transitions, 5297 flow. Second operand 7 states and 214 transitions. [2024-06-03 18:48:02,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 415 transitions, 6809 flow [2024-06-03 18:48:03,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 415 transitions, 6708 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 18:48:03,162 INFO L231 Difference]: Finished difference. Result has 203 places, 363 transitions, 5422 flow [2024-06-03 18:48:03,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5422, PETRI_PLACES=203, PETRI_TRANSITIONS=363} [2024-06-03 18:48:03,162 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 150 predicate places. [2024-06-03 18:48:03,162 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 363 transitions, 5422 flow [2024-06-03 18:48:03,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:03,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:03,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:48:03,163 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:03,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 528881228, now seen corresponding path program 3 times [2024-06-03 18:48:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766253468] [2024-06-03 18:48:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:03,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:03,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766253468] [2024-06-03 18:48:03,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766253468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:03,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:03,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478651603] [2024-06-03 18:48:03,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:03,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:03,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:03,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:03,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 363 transitions, 5422 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:03,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:03,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:03,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:04,857 INFO L124 PetriNetUnfolderBase]: 8282/12254 cut-off events. [2024-06-03 18:48:04,857 INFO L125 PetriNetUnfolderBase]: For 498134/498143 co-relation queries the response was YES. [2024-06-03 18:48:04,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97024 conditions, 12254 events. 8282/12254 cut-off events. For 498134/498143 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 74680 event pairs, 2483 based on Foata normal form. 44/12290 useless extension candidates. Maximal degree in co-relation 96923. Up to 11068 conditions per place. [2024-06-03 18:48:05,005 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 355 selfloop transitions, 44 changer transitions 0/407 dead transitions. [2024-06-03 18:48:05,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 407 transitions, 6632 flow [2024-06-03 18:48:05,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:48:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:48:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-03 18:48:05,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-06-03 18:48:05,006 INFO L175 Difference]: Start difference. First operand has 203 places, 363 transitions, 5422 flow. Second operand 7 states and 208 transitions. [2024-06-03 18:48:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 407 transitions, 6632 flow [2024-06-03 18:48:06,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 407 transitions, 6535 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 18:48:06,246 INFO L231 Difference]: Finished difference. Result has 207 places, 365 transitions, 5494 flow [2024-06-03 18:48:06,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5325, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5494, PETRI_PLACES=207, PETRI_TRANSITIONS=365} [2024-06-03 18:48:06,246 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 154 predicate places. [2024-06-03 18:48:06,246 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 365 transitions, 5494 flow [2024-06-03 18:48:06,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:06,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:06,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:06,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:48:06,247 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)] === [2024-06-03 18:48:06,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:06,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1165277175, now seen corresponding path program 1 times [2024-06-03 18:48:06,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:06,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877306773] [2024-06-03 18:48:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:06,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:06,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:06,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877306773] [2024-06-03 18:48:06,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877306773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:06,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:06,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:48:06,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17661838] [2024-06-03 18:48:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:06,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:48:06,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:48:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:48:06,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:06,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 365 transitions, 5494 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) [2024-06-03 18:48:06,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:06,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:06,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:07,956 INFO L124 PetriNetUnfolderBase]: 8289/12276 cut-off events. [2024-06-03 18:48:07,957 INFO L125 PetriNetUnfolderBase]: For 488652/488652 co-relation queries the response was YES. [2024-06-03 18:48:08,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98070 conditions, 12276 events. 8289/12276 cut-off events. For 488652/488652 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 74994 event pairs, 2498 based on Foata normal form. 1/12272 useless extension candidates. Maximal degree in co-relation 97967. Up to 11466 conditions per place. [2024-06-03 18:48:08,100 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 371 selfloop transitions, 20 changer transitions 0/399 dead transitions. [2024-06-03 18:48:08,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 399 transitions, 6735 flow [2024-06-03 18:48:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:48:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:48:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-03 18:48:08,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-03 18:48:08,101 INFO L175 Difference]: Start difference. First operand has 207 places, 365 transitions, 5494 flow. Second operand 5 states and 144 transitions. [2024-06-03 18:48:08,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 399 transitions, 6735 flow [2024-06-03 18:48:09,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 399 transitions, 6586 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 18:48:09,470 INFO L231 Difference]: Finished difference. Result has 209 places, 380 transitions, 5773 flow [2024-06-03 18:48:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5773, PETRI_PLACES=209, PETRI_TRANSITIONS=380} [2024-06-03 18:48:09,472 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 156 predicate places. [2024-06-03 18:48:09,472 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 380 transitions, 5773 flow [2024-06-03 18:48:09,472 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) [2024-06-03 18:48:09,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:09,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:09,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:48:09,472 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:09,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash 647786060, now seen corresponding path program 4 times [2024-06-03 18:48:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399204118] [2024-06-03 18:48:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399204118] [2024-06-03 18:48:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399204118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:09,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409723072] [2024-06-03 18:48:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:09,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:09,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 380 transitions, 5773 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:09,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:09,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:09,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:11,301 INFO L124 PetriNetUnfolderBase]: 8566/12660 cut-off events. [2024-06-03 18:48:11,301 INFO L125 PetriNetUnfolderBase]: For 542636/542645 co-relation queries the response was YES. [2024-06-03 18:48:11,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100722 conditions, 12660 events. 8566/12660 cut-off events. For 542636/542645 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 77476 event pairs, 2544 based on Foata normal form. 44/12694 useless extension candidates. Maximal degree in co-relation 100616. Up to 11504 conditions per place. [2024-06-03 18:48:11,468 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 361 selfloop transitions, 46 changer transitions 0/415 dead transitions. [2024-06-03 18:48:11,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 415 transitions, 6861 flow [2024-06-03 18:48:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:48:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:48:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 18:48:11,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-03 18:48:11,469 INFO L175 Difference]: Start difference. First operand has 209 places, 380 transitions, 5773 flow. Second operand 6 states and 181 transitions. [2024-06-03 18:48:11,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 415 transitions, 6861 flow [2024-06-03 18:48:12,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 415 transitions, 6823 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-03 18:48:12,669 INFO L231 Difference]: Finished difference. Result has 215 places, 382 transitions, 5909 flow [2024-06-03 18:48:12,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5909, PETRI_PLACES=215, PETRI_TRANSITIONS=382} [2024-06-03 18:48:12,670 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-03 18:48:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 382 transitions, 5909 flow [2024-06-03 18:48:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:12,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:12,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:48:12,671 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1248458828, now seen corresponding path program 5 times [2024-06-03 18:48:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490520900] [2024-06-03 18:48:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:12,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:12,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490520900] [2024-06-03 18:48:12,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490520900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:12,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:12,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:12,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517908630] [2024-06-03 18:48:12,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:12,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:12,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:12,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 382 transitions, 5909 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:12,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:12,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:12,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:14,719 INFO L124 PetriNetUnfolderBase]: 8799/13031 cut-off events. [2024-06-03 18:48:14,719 INFO L125 PetriNetUnfolderBase]: For 567747/567756 co-relation queries the response was YES. [2024-06-03 18:48:14,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104350 conditions, 13031 events. 8799/13031 cut-off events. For 567747/567756 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 80427 event pairs, 2480 based on Foata normal form. 38/13061 useless extension candidates. Maximal degree in co-relation 104241. Up to 11020 conditions per place. [2024-06-03 18:48:14,885 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 376 selfloop transitions, 49 changer transitions 0/433 dead transitions. [2024-06-03 18:48:14,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 433 transitions, 7375 flow [2024-06-03 18:48:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:48:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:48:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-03 18:48:14,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-03 18:48:14,886 INFO L175 Difference]: Start difference. First operand has 215 places, 382 transitions, 5909 flow. Second operand 6 states and 191 transitions. [2024-06-03 18:48:14,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 433 transitions, 7375 flow [2024-06-03 18:48:16,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 433 transitions, 7240 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 18:48:16,071 INFO L231 Difference]: Finished difference. Result has 218 places, 386 transitions, 6023 flow [2024-06-03 18:48:16,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5774, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6023, PETRI_PLACES=218, PETRI_TRANSITIONS=386} [2024-06-03 18:48:16,072 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-06-03 18:48:16,072 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 386 transitions, 6023 flow [2024-06-03 18:48:16,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:16,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:16,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:16,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:48:16,072 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1447908488, now seen corresponding path program 6 times [2024-06-03 18:48:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441708918] [2024-06-03 18:48:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:16,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441708918] [2024-06-03 18:48:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441708918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:16,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:16,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:16,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418051818] [2024-06-03 18:48:16,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:16,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:16,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:16,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 386 transitions, 6023 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:16,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:16,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:16,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:17,998 INFO L124 PetriNetUnfolderBase]: 8883/13139 cut-off events. [2024-06-03 18:48:17,998 INFO L125 PetriNetUnfolderBase]: For 592164/592173 co-relation queries the response was YES. [2024-06-03 18:48:18,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105669 conditions, 13139 events. 8883/13139 cut-off events. For 592164/592173 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 81177 event pairs, 2641 based on Foata normal form. 48/13177 useless extension candidates. Maximal degree in co-relation 105558. Up to 12013 conditions per place. [2024-06-03 18:48:18,675 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 371 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-03 18:48:18,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 429 transitions, 7172 flow [2024-06-03 18:48:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-03 18:48:18,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-03 18:48:18,697 INFO L175 Difference]: Start difference. First operand has 218 places, 386 transitions, 6023 flow. Second operand 8 states and 231 transitions. [2024-06-03 18:48:18,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 429 transitions, 7172 flow [2024-06-03 18:48:20,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 429 transitions, 6957 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-03 18:48:20,109 INFO L231 Difference]: Finished difference. Result has 221 places, 388 transitions, 5999 flow [2024-06-03 18:48:20,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5999, PETRI_PLACES=221, PETRI_TRANSITIONS=388} [2024-06-03 18:48:20,109 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 168 predicate places. [2024-06-03 18:48:20,109 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 388 transitions, 5999 flow [2024-06-03 18:48:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:20,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:20,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:20,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:48:20,110 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:20,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1455533000, now seen corresponding path program 1 times [2024-06-03 18:48:20,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:20,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708851692] [2024-06-03 18:48:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:20,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708851692] [2024-06-03 18:48:20,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708851692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:20,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:20,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059373694] [2024-06-03 18:48:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:20,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:20,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 388 transitions, 5999 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:20,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:20,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:20,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:22,441 INFO L124 PetriNetUnfolderBase]: 8967/13260 cut-off events. [2024-06-03 18:48:22,441 INFO L125 PetriNetUnfolderBase]: For 592069/592078 co-relation queries the response was YES. [2024-06-03 18:48:22,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104712 conditions, 13260 events. 8967/13260 cut-off events. For 592069/592078 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 81889 event pairs, 2483 based on Foata normal form. 42/13292 useless extension candidates. Maximal degree in co-relation 104601. Up to 11602 conditions per place. [2024-06-03 18:48:22,589 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 372 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-03 18:48:22,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 437 transitions, 7214 flow [2024-06-03 18:48:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-03 18:48:22,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-03 18:48:22,591 INFO L175 Difference]: Start difference. First operand has 221 places, 388 transitions, 5999 flow. Second operand 8 states and 235 transitions. [2024-06-03 18:48:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 437 transitions, 7214 flow [2024-06-03 18:48:23,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 437 transitions, 7069 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 18:48:24,003 INFO L231 Difference]: Finished difference. Result has 223 places, 390 transitions, 6051 flow [2024-06-03 18:48:24,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6051, PETRI_PLACES=223, PETRI_TRANSITIONS=390} [2024-06-03 18:48:24,004 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 170 predicate places. [2024-06-03 18:48:24,004 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 390 transitions, 6051 flow [2024-06-03 18:48:24,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:24,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:24,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:24,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:48:24,005 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)] === [2024-06-03 18:48:24,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:24,005 INFO L85 PathProgramCache]: Analyzing trace with hash 190261995, now seen corresponding path program 2 times [2024-06-03 18:48:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:24,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117069077] [2024-06-03 18:48:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:24,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:24,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117069077] [2024-06-03 18:48:24,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117069077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:24,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:24,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:48:24,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922003480] [2024-06-03 18:48:24,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:24,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:48:24,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:24,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:48:24,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:48:24,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:24,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 390 transitions, 6051 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) [2024-06-03 18:48:24,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:24,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:24,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:26,150 INFO L124 PetriNetUnfolderBase]: 8963/13260 cut-off events. [2024-06-03 18:48:26,150 INFO L125 PetriNetUnfolderBase]: For 582467/582467 co-relation queries the response was YES. [2024-06-03 18:48:26,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105272 conditions, 13260 events. 8963/13260 cut-off events. For 582467/582467 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 81967 event pairs, 2695 based on Foata normal form. 1/13254 useless extension candidates. Maximal degree in co-relation 105160. Up to 12432 conditions per place. [2024-06-03 18:48:26,426 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 374 selfloop transitions, 20 changer transitions 0/402 dead transitions. [2024-06-03 18:48:26,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 402 transitions, 6869 flow [2024-06-03 18:48:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:48:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:48:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 18:48:26,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-03 18:48:26,427 INFO L175 Difference]: Start difference. First operand has 223 places, 390 transitions, 6051 flow. Second operand 5 states and 137 transitions. [2024-06-03 18:48:26,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 402 transitions, 6869 flow [2024-06-03 18:48:27,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 402 transitions, 6696 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 18:48:27,467 INFO L231 Difference]: Finished difference. Result has 222 places, 390 transitions, 5925 flow [2024-06-03 18:48:27,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5925, PETRI_PLACES=222, PETRI_TRANSITIONS=390} [2024-06-03 18:48:27,468 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 169 predicate places. [2024-06-03 18:48:27,468 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 390 transitions, 5925 flow [2024-06-03 18:48:27,468 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) [2024-06-03 18:48:27,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:27,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:27,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 18:48:27,468 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)] === [2024-06-03 18:48:27,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1154788759, now seen corresponding path program 1 times [2024-06-03 18:48:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545192930] [2024-06-03 18:48:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545192930] [2024-06-03 18:48:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545192930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:27,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:48:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239483888] [2024-06-03 18:48:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:27,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:48:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:48:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:48:27,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-03 18:48:27,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 390 transitions, 5925 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) [2024-06-03 18:48:27,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:27,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-03 18:48:27,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:29,666 INFO L124 PetriNetUnfolderBase]: 8535/12755 cut-off events. [2024-06-03 18:48:29,666 INFO L125 PetriNetUnfolderBase]: For 600373/600381 co-relation queries the response was YES. [2024-06-03 18:48:29,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101278 conditions, 12755 events. 8535/12755 cut-off events. For 600373/600381 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 80401 event pairs, 2593 based on Foata normal form. 15/12618 useless extension candidates. Maximal degree in co-relation 101165. Up to 11285 conditions per place. [2024-06-03 18:48:29,950 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 323 selfloop transitions, 23 changer transitions 0/409 dead transitions. [2024-06-03 18:48:29,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 409 transitions, 6743 flow [2024-06-03 18:48:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:48:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:48:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-03 18:48:29,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596 [2024-06-03 18:48:29,951 INFO L175 Difference]: Start difference. First operand has 222 places, 390 transitions, 5925 flow. Second operand 5 states and 149 transitions. [2024-06-03 18:48:29,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 409 transitions, 6743 flow [2024-06-03 18:48:31,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 409 transitions, 6714 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-03 18:48:31,194 INFO L231 Difference]: Finished difference. Result has 226 places, 393 transitions, 6020 flow [2024-06-03 18:48:31,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6020, PETRI_PLACES=226, PETRI_TRANSITIONS=393} [2024-06-03 18:48:31,195 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 173 predicate places. [2024-06-03 18:48:31,195 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 393 transitions, 6020 flow [2024-06-03 18:48:31,195 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) [2024-06-03 18:48:31,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:31,195 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] [2024-06-03 18:48:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 18:48:31,195 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:31,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash 28493204, now seen corresponding path program 1 times [2024-06-03 18:48:31,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105129214] [2024-06-03 18:48:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105129214] [2024-06-03 18:48:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105129214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:31,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:31,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:48:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124528910] [2024-06-03 18:48:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:48:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:48:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:48:31,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:31,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 393 transitions, 6020 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:31,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:31,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:31,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:33,612 INFO L124 PetriNetUnfolderBase]: 9105/13466 cut-off events. [2024-06-03 18:48:33,613 INFO L125 PetriNetUnfolderBase]: For 614833/614845 co-relation queries the response was YES. [2024-06-03 18:48:33,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107398 conditions, 13466 events. 9105/13466 cut-off events. For 614833/614845 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 83491 event pairs, 2682 based on Foata normal form. 9/13462 useless extension candidates. Maximal degree in co-relation 107283. Up to 12175 conditions per place. [2024-06-03 18:48:33,770 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 143 changer transitions 0/449 dead transitions. [2024-06-03 18:48:33,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 449 transitions, 7577 flow [2024-06-03 18:48:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:48:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:48:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-03 18:48:33,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-03 18:48:33,771 INFO L175 Difference]: Start difference. First operand has 226 places, 393 transitions, 6020 flow. Second operand 7 states and 215 transitions. [2024-06-03 18:48:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 449 transitions, 7577 flow [2024-06-03 18:48:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 449 transitions, 7519 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-03 18:48:35,280 INFO L231 Difference]: Finished difference. Result has 233 places, 416 transitions, 6734 flow [2024-06-03 18:48:35,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6734, PETRI_PLACES=233, PETRI_TRANSITIONS=416} [2024-06-03 18:48:35,280 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-06-03 18:48:35,280 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 416 transitions, 6734 flow [2024-06-03 18:48:35,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:35,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:35,281 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] [2024-06-03 18:48:35,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 18:48:35,281 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:35,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 346918146, now seen corresponding path program 1 times [2024-06-03 18:48:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711146678] [2024-06-03 18:48:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711146678] [2024-06-03 18:48:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711146678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:48:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183173958] [2024-06-03 18:48:35,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:35,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:48:35,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:48:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:48:35,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:35,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 416 transitions, 6734 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:35,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:35,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:35,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:38,235 INFO L124 PetriNetUnfolderBase]: 10104/14952 cut-off events. [2024-06-03 18:48:38,235 INFO L125 PetriNetUnfolderBase]: For 795547/795559 co-relation queries the response was YES. [2024-06-03 18:48:38,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125090 conditions, 14952 events. 10104/14952 cut-off events. For 795547/795559 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 94133 event pairs, 2410 based on Foata normal form. 54/14993 useless extension candidates. Maximal degree in co-relation 124972. Up to 12166 conditions per place. [2024-06-03 18:48:38,411 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 412 selfloop transitions, 63 changer transitions 0/483 dead transitions. [2024-06-03 18:48:38,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 483 transitions, 8612 flow [2024-06-03 18:48:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:48:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:48:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-03 18:48:38,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-03 18:48:38,412 INFO L175 Difference]: Start difference. First operand has 233 places, 416 transitions, 6734 flow. Second operand 7 states and 225 transitions. [2024-06-03 18:48:38,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 483 transitions, 8612 flow [2024-06-03 18:48:40,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 483 transitions, 8354 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-03 18:48:40,361 INFO L231 Difference]: Finished difference. Result has 239 places, 427 transitions, 6911 flow [2024-06-03 18:48:40,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6476, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6911, PETRI_PLACES=239, PETRI_TRANSITIONS=427} [2024-06-03 18:48:40,361 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-06-03 18:48:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 427 transitions, 6911 flow [2024-06-03 18:48:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:40,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:40,362 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] [2024-06-03 18:48:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 18:48:40,362 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 413886496, now seen corresponding path program 2 times [2024-06-03 18:48:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917600097] [2024-06-03 18:48:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:40,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:40,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917600097] [2024-06-03 18:48:40,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917600097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:40,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:40,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:48:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450542115] [2024-06-03 18:48:40,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:40,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:48:40,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:48:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:48:40,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:40,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 427 transitions, 6911 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:40,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:40,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:40,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:43,192 INFO L124 PetriNetUnfolderBase]: 10292/15240 cut-off events. [2024-06-03 18:48:43,193 INFO L125 PetriNetUnfolderBase]: For 837886/837898 co-relation queries the response was YES. [2024-06-03 18:48:43,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129366 conditions, 15240 events. 10292/15240 cut-off events. For 837886/837898 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 96379 event pairs, 2453 based on Foata normal form. 54/15281 useless extension candidates. Maximal degree in co-relation 129244. Up to 12256 conditions per place. [2024-06-03 18:48:43,592 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 397 selfloop transitions, 67 changer transitions 0/472 dead transitions. [2024-06-03 18:48:43,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 472 transitions, 8317 flow [2024-06-03 18:48:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:48:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:48:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-03 18:48:43,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-03 18:48:43,593 INFO L175 Difference]: Start difference. First operand has 239 places, 427 transitions, 6911 flow. Second operand 6 states and 192 transitions. [2024-06-03 18:48:43,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 472 transitions, 8317 flow [2024-06-03 18:48:45,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 472 transitions, 8153 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-03 18:48:45,205 INFO L231 Difference]: Finished difference. Result has 244 places, 431 transitions, 7086 flow [2024-06-03 18:48:45,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7086, PETRI_PLACES=244, PETRI_TRANSITIONS=431} [2024-06-03 18:48:45,206 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 191 predicate places. [2024-06-03 18:48:45,206 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 431 transitions, 7086 flow [2024-06-03 18:48:45,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:45,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:45,206 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] [2024-06-03 18:48:45,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 18:48:45,206 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1777911878, now seen corresponding path program 2 times [2024-06-03 18:48:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:45,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890621907] [2024-06-03 18:48:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:45,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:45,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:45,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890621907] [2024-06-03 18:48:45,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890621907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:45,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:45,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:48:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741143496] [2024-06-03 18:48:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:45,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:48:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:48:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:48:45,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:45,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 431 transitions, 7086 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:45,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:45,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:45,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:48,238 INFO L124 PetriNetUnfolderBase]: 10396/15388 cut-off events. [2024-06-03 18:48:48,238 INFO L125 PetriNetUnfolderBase]: For 830338/830350 co-relation queries the response was YES. [2024-06-03 18:48:48,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132365 conditions, 15388 events. 10396/15388 cut-off events. For 830338/830350 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 97669 event pairs, 3058 based on Foata normal form. 9/15384 useless extension candidates. Maximal degree in co-relation 132240. Up to 13688 conditions per place. [2024-06-03 18:48:48,436 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 296 selfloop transitions, 194 changer transitions 0/498 dead transitions. [2024-06-03 18:48:48,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 498 transitions, 9042 flow [2024-06-03 18:48:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:48:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:48:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2024-06-03 18:48:48,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-03 18:48:48,437 INFO L175 Difference]: Start difference. First operand has 244 places, 431 transitions, 7086 flow. Second operand 11 states and 315 transitions. [2024-06-03 18:48:48,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 498 transitions, 9042 flow [2024-06-03 18:48:50,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 498 transitions, 8853 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-03 18:48:50,947 INFO L231 Difference]: Finished difference. Result has 254 places, 446 transitions, 7709 flow [2024-06-03 18:48:50,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7709, PETRI_PLACES=254, PETRI_TRANSITIONS=446} [2024-06-03 18:48:50,948 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 201 predicate places. [2024-06-03 18:48:50,948 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 446 transitions, 7709 flow [2024-06-03 18:48:50,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:50,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:50,948 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] [2024-06-03 18:48:50,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 18:48:50,948 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:50,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:50,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1870058964, now seen corresponding path program 3 times [2024-06-03 18:48:50,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704322495] [2024-06-03 18:48:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:51,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:51,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704322495] [2024-06-03 18:48:51,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704322495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:51,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:51,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:48:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400955479] [2024-06-03 18:48:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:48:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:48:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:48:51,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:51,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 446 transitions, 7709 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:51,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:51,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:51,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:54,020 INFO L124 PetriNetUnfolderBase]: 10478/15515 cut-off events. [2024-06-03 18:48:54,021 INFO L125 PetriNetUnfolderBase]: For 846473/846485 co-relation queries the response was YES. [2024-06-03 18:48:54,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135433 conditions, 15515 events. 10478/15515 cut-off events. For 846473/846485 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 98629 event pairs, 3082 based on Foata normal form. 9/15511 useless extension candidates. Maximal degree in co-relation 135305. Up to 13769 conditions per place. [2024-06-03 18:48:54,252 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 286 selfloop transitions, 213 changer transitions 0/507 dead transitions. [2024-06-03 18:48:54,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 507 transitions, 9823 flow [2024-06-03 18:48:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:48:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:48:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 292 transitions. [2024-06-03 18:48:54,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584 [2024-06-03 18:48:54,253 INFO L175 Difference]: Start difference. First operand has 254 places, 446 transitions, 7709 flow. Second operand 10 states and 292 transitions. [2024-06-03 18:48:54,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 507 transitions, 9823 flow [2024-06-03 18:48:56,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 507 transitions, 9227 flow, removed 186 selfloop flow, removed 6 redundant places. [2024-06-03 18:48:56,581 INFO L231 Difference]: Finished difference. Result has 260 places, 461 transitions, 8077 flow [2024-06-03 18:48:56,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7221, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8077, PETRI_PLACES=260, PETRI_TRANSITIONS=461} [2024-06-03 18:48:56,582 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 207 predicate places. [2024-06-03 18:48:56,582 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 461 transitions, 8077 flow [2024-06-03 18:48:56,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:56,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:56,582 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] [2024-06-03 18:48:56,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 18:48:56,583 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 18:48:56,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:56,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1778200178, now seen corresponding path program 4 times [2024-06-03 18:48:56,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:56,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994170182] [2024-06-03 18:48:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:56,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:56,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:56,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994170182] [2024-06-03 18:48:56,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994170182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:56,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:56,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:48:56,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462357045] [2024-06-03 18:48:56,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:56,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:48:56,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:48:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:48:56,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-03 18:48:56,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 461 transitions, 8077 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:56,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:56,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-03 18:48:56,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand